617220057 has 4 divisors (see below), whose sum is σ = 822960080. Its totient is φ = 411480036.

The previous prime is 617220053. The next prime is 617220067. The reversal of 617220057 is 750022716.

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 not a de Polignac number, because 617220057 - 2² = 617220053 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (617220053) 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, 102870007 + ... + 102870012.

It is an arithmetic number, because the mean of its divisors is an integer number (205740020).

Almost surely, 2^617220057 is an apocalyptic number.

It is an amenable number.

617220057 is a deficient number, since it is larger than the sum of its proper divisors (205740023).

617220057 is a wasteful number, since it uses less digits than its factorization.

617220057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 205740022.

The product of its (nonzero) digits is 5880, while the sum is 30.

The square root of 617220057 is about 24843.9138824783. The cubic root of 617220057 is about 851.4255464991.

The spelling of 617220057 in words is "six hundred seventeen million, two hundred twenty thousand, fifty-seven".