616972501 has 4 divisors (see below), whose sum is σ = 617539104. Its totient is φ = 616405900.

The previous prime is 616972481. The next prime is 616972511. The reversal of 616972501 is 105279616.

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 616972501 - 2⁹ = 616971989 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 (616972511) 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, 281665 + ... + 283846.

It is an arithmetic number, because the mean of its divisors is an integer number (154384776).

Almost surely, 2^616972501 is an apocalyptic number.

It is an amenable number.

616972501 is a deficient number, since it is larger than the sum of its proper divisors (566603).

616972501 is a wasteful number, since it uses less digits than its factorization.

616972501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 566602.

The product of its (nonzero) digits is 22680, while the sum is 37.

The square root of 616972501 is about 24838.9311565534. The cubic root of 616972501 is about 851.3117007235.

The spelling of 616972501 in words is "six hundred sixteen million, nine hundred seventy-two thousand, five hundred one".