8004940657 has 4 divisors (see below), whose sum is σ = 9148503616. Its totient is φ = 6861377700.

The previous prime is 8004940613. The next prime is 8004940693. The reversal of 8004940657 is 7560494008.

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 8004940657 - 2⁷ = 8004940529 is a prime.

It is not an unprimeable number, because it can be changed into a prime (8004940457) 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, 571781469 + ... + 571781482.

It is an arithmetic number, because the mean of its divisors is an integer number (2287125904).

Almost surely, 2^8004940657 is an apocalyptic number.

It is an amenable number.

8004940657 is a deficient number, since it is larger than the sum of its proper divisors (1143562959).

8004940657 is a wasteful number, since it uses less digits than its factorization.

8004940657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1143562958.

The product of its (nonzero) digits is 241920, while the sum is 43.

The square root of 8004940657 is about 89470.3339493041. Note that the first 3 decimals coincide. The cubic root of 8004940657 is about 2000.4116366885.

The spelling of 8004940657 in words is "eight billion, four million, nine hundred forty thousand, six hundred fifty-seven".