7978276493 has 4 divisors (see below), whose sum is σ = 8703574368. Its totient is φ = 7252978620.

The previous prime is 7978276463. The next prime is 7978276499. The reversal of 7978276493 is 3946728797.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 7978276493 - 2⁶ = 7978276429 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7978276499) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 362648921 + ... + 362648942.

It is an arithmetic number, because the mean of its divisors is an integer number (2175893592).

Almost surely, 2^7978276493 is an apocalyptic number.

It is an amenable number.

7978276493 is a deficient number, since it is larger than the sum of its proper divisors (725297875).

7978276493 is a wasteful number, since it uses less digits than its factorization.

7978276493 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 725297874.

The product of its digits is 32006016, while the sum is 62.

The square root of 7978276493 is about 89321.1984525510. The cubic root of 7978276493 is about 1998.1880666946.

The spelling of 7978276493 in words is "seven billion, nine hundred seventy-eight million, two hundred seventy-six thousand, four hundred ninety-three".