616563903 has 4 divisors (see below), whose sum is σ = 822085208. Its totient is φ = 411042600.

The previous prime is 616563887. The next prime is 616563911. The reversal of 616563903 is 309365616.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 616563903 - 2⁴ = 616563887 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 (616563943) 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, 102760648 + ... + 102760653.

It is an arithmetic number, because the mean of its divisors is an integer number (205521302).

Almost surely, 2^616563903 is an apocalyptic number.

616563903 is a deficient number, since it is larger than the sum of its proper divisors (205521305).

616563903 is a wasteful number, since it uses less digits than its factorization.

616563903 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 205521304.

The product of its (nonzero) digits is 87480, while the sum is 39.

The square root of 616563903 is about 24830.7048429963. The cubic root of 616563903 is about 851.1237285021.

The spelling of 616563903 in words is "six hundred sixteen million, five hundred sixty-three thousand, nine hundred three".