872428091 has 2 divisors, whose sum is σ = 872428092. Its totient is φ = 872428090.

The previous prime is 872428057. The next prime is 872428097. The reversal of 872428091 is 190824278.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 872428091 - 2²² = 868233787 is a prime.

It is a super-2 number, since 2×872428091² = 1522261547931808562, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (872428097) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 436214045 + 436214046.

It is an arithmetic number, because the mean of its divisors is an integer number (436214046).

Almost surely, 2^872428091 is an apocalyptic number.

872428091 is a deficient number, since it is larger than the sum of its proper divisors (1).

872428091 is an equidigital number, since it uses as much as digits as its factorization.

872428091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 64512, while the sum is 41.

The square root of 872428091 is about 29536.8937263213. The cubic root of 872428091 is about 955.5275507782.

The spelling of 872428091 in words is "eight hundred seventy-two million, four hundred twenty-eight thousand, ninety-one".