7948993765 has 4 divisors (see below), whose sum is σ = 9538792524. Its totient is φ = 6359195008.

The previous prime is 7948993697. The next prime is 7948993823. The reversal of 7948993765 is 5673998497.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5673998497 = 761 ⋅7455977.

It can be written as a sum of positive squares in 2 ways, for example, as 3200956929 + 4748036836 = 56577^2 + 68906^2 .

It is a cyclic number.

It is not a de Polignac number, because 7948993765 - 2⁹ = 7948993253 is a prime.

It is a super-3 number, since 3×7948993765³ (a number of 31 digits) contains 333 as substring.

It is a Smith number, since the sum of its digits (67) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 7948993765.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 794899372 + ... + 794899381.

It is an arithmetic number, because the mean of its divisors is an integer number (2384698131).

Almost surely, 2^7948993765 is an apocalyptic number.

It is an amenable number.

7948993765 is a deficient number, since it is larger than the sum of its proper divisors (1589798759).

7948993765 is a wasteful number, since it uses less digits than its factorization.

7948993765 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1589798758.

The product of its digits is 102876480, while the sum is 67.

The square root of 7948993765 is about 89157.1296363897. The cubic root of 7948993765 is about 1995.7404148242.

The spelling of 7948993765 in words is "seven billion, nine hundred forty-eight million, nine hundred ninety-three thousand, seven hundred sixty-five".