616970881 has 4 divisors (see below), whose sum is σ = 622737072. Its totient is φ = 611204692.

The previous prime is 616970863. The next prime is 616970891. The reversal of 616970881 is 188079616.

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 616970881 - 2²¹ = 614873729 is a prime.

It is a super-2 number, since 2×616970881² = 761306136003832322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (616970891) 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, 2882935 + ... + 2883148.

It is an arithmetic number, because the mean of its divisors is an integer number (155684268).

Almost surely, 2^616970881 is an apocalyptic number.

It is an amenable number.

616970881 is a deficient number, since it is larger than the sum of its proper divisors (5766191).

616970881 is a wasteful number, since it uses less digits than its factorization.

616970881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5766190.

The product of its (nonzero) digits is 145152, while the sum is 46.

The square root of 616970881 is about 24838.8985464332. The cubic root of 616970881 is about 851.3109556195.

The spelling of 616970881 in words is "six hundred sixteen million, nine hundred seventy thousand, eight hundred eighty-one".