642696597 has 12 divisors (see below), whose sum is σ = 930768384. Its totient is φ = 427343400.

The previous prime is 642696589. The next prime is 642696647. The reversal of 642696597 is 795696246.

642696597 is a `hidden beast` number, since 6 + 42 + 6 + 9 + 6 + 597 = 666.

642696597 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 642696597 - 2³ = 642696589 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (642696097) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 89779 + ... + 96672.

It is an arithmetic number, because the mean of its divisors is an integer number (77564032).

Almost surely, 2^642696597 is an apocalyptic number.

It is an amenable number.

642696597 is a deficient number, since it is larger than the sum of its proper divisors (288071787).

642696597 is a wasteful number, since it uses less digits than its factorization.

642696597 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 186840 (or 186837 counting only the distinct ones).

The product of its digits is 4898880, while the sum is 54.

The square root of 642696597 is about 25351.4614371637. The cubic root of 642696597 is about 862.9825221911.

The spelling of 642696597 in words is "six hundred forty-two million, six hundred ninety-six thousand, five hundred ninety-seven".