7948739 has 4 divisors (see below), whose sum is σ = 7954656. Its totient is φ = 7942824.

The previous prime is 7948723. The next prime is 7948757. The reversal of 7948739 is 9378497.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 9378497 = 271 ⋅34607.

It is a cyclic number.

It is not a de Polignac number, because 7948739 - 2⁴ = 7948723 is a prime.

It is a d-powerful number, because it can be written as 7 + 9 + 4¹⁰ + 8⁷ + 7³ + 3⁹ + 9⁷ .

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 7948693 and 7948702.

It is not an unprimeable number, because it can be changed into a prime (7948769) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 137 + ... + 3989.

It is an arithmetic number, because the mean of its divisors is an integer number (1988664).

Almost surely, 2^7948739 is an apocalyptic number.

7948739 is a deficient number, since it is larger than the sum of its proper divisors (5917).

7948739 is a wasteful number, since it uses less digits than its factorization.

7948739 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5916.

The product of its digits is 381024, while the sum is 47.

The square root of 7948739 is about 2819.3508118005. The cubic root of 7948739 is about 199.5719093457.

The spelling of 7948739 in words is "seven million, nine hundred forty-eight thousand, seven hundred thirty-nine".