642727337 has 8 divisors (see below), whose sum is σ = 741819072. Its totient is φ = 545454000.

The previous prime is 642727291. The next prime is 642727339. The reversal of 642727337 is 733727246.

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

It is not a de Polignac number, because 642727337 - 2⁶ = 642727273 is a prime.

It is a super-2 number, since 2×642727337² = 826196859454223138, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 642727294 and 642727303.

It is not an unprimeable number, because it can be changed into a prime (642727339) 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, 453839 + ... + 455252.

It is an arithmetic number, because the mean of its divisors is an integer number (92727384).

Almost surely, 2^642727337 is an apocalyptic number.

It is an amenable number.

642727337 is a deficient number, since it is larger than the sum of its proper divisors (99091735).

642727337 is a wasteful number, since it uses less digits than its factorization.

642727337 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 909199.

The product of its digits is 296352, while the sum is 41.

The square root of 642727337 is about 25352.0677065994. The cubic root of 642727337 is about 862.9962807099.

Subtracting 642727337 from its reverse (733727246), we obtain a palindrome (90999909).

The spelling of 642727337 in words is "six hundred forty-two million, seven hundred twenty-seven thousand, three hundred thirty-seven".