642926599 has 12 divisors (see below), whose sum is σ = 760573800. Its totient is φ = 541737168.

The previous prime is 642926597. The next prime is 642926629. The reversal of 642926599 is 995629246.

It is not a de Polignac number, because 642926599 - 2¹ = 642926597 is a prime.

It is a super-2 number, since 2×642926599² = 826709223403413602, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (642926593) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 108304 + ... + 114085.

It is an arithmetic number, because the mean of its divisors is an integer number (63381150).

Almost surely, 2^642926599 is an apocalyptic number.

642926599 is a deficient number, since it is larger than the sum of its proper divisors (117647201).

642926599 is a wasteful number, since it uses less digits than its factorization.

642926599 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 222462 (or 222455 counting only the distinct ones).

The product of its digits is 2099520, while the sum is 52.

The square root of 642926599 is about 25355.9972984696. The cubic root of 642926599 is about 863.0854551738.

The spelling of 642926599 in words is "six hundred forty-two million, nine hundred twenty-six thousand, five hundred ninety-nine".