872550417 has 4 divisors (see below), whose sum is σ = 1163400560. Its totient is φ = 581700276.

The previous prime is 872550409. The next prime is 872550487. The reversal of 872550417 is 714055278.

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 872550417 - 2³ = 872550409 is a prime.

It is a super-2 number, since 2×872550417² = 1522688460413747778, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (872550487) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 145425067 + ... + 145425072.

It is an arithmetic number, because the mean of its divisors is an integer number (290850140).

Almost surely, 2^872550417 is an apocalyptic number.

It is an amenable number.

872550417 is a deficient number, since it is larger than the sum of its proper divisors (290850143).

872550417 is a wasteful number, since it uses less digits than its factorization.

872550417 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 290850142.

The product of its (nonzero) digits is 78400, while the sum is 39.

The square root of 872550417 is about 29538.9643860444. The cubic root of 872550417 is about 955.5722079069.

The spelling of 872550417 in words is "eight hundred seventy-two million, five hundred fifty thousand, four hundred seventeen".