642436597 has 8 divisors (see below), whose sum is σ = 705483072. Its totient is φ = 580164000.

The previous prime is 642436589. The next prime is 642436601. The reversal of 642436597 is 795634246.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 642436597 - 2³ = 642436589 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 (642436537) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 191728 + ... + 195049.

It is an arithmetic number, because the mean of its divisors is an integer number (88185384).

Almost surely, 2^642436597 is an apocalyptic number.

It is an amenable number.

642436597 is a deficient number, since it is larger than the sum of its proper divisors (63046475).

642436597 is a wasteful number, since it uses less digits than its factorization.

642436597 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 386939.

The product of its digits is 1088640, while the sum is 46.

The square root of 642436597 is about 25346.3330089384. Note that the first 3 decimals coincide. The cubic root of 642436597 is about 862.8661346036.

The spelling of 642436597 in words is "six hundred forty-two million, four hundred thirty-six thousand, five hundred ninety-seven".