45089881 has 2 divisors, whose sum is σ = 45089882. Its totient is φ = 45089880.

The previous prime is 45089839. The next prime is 45089893. The reversal of 45089881 is 18898054.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 30074256 + 15015625 = 5484^2 + 3875^2 .

It is a cyclic number.

It is not a de Polignac number, because 45089881 - 2²⁵ = 11535449 is a prime.

It is a super-2 number, since 2×45089881² = 4066194737188322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (45089801) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22544940 + 22544941.

It is an arithmetic number, because the mean of its divisors is an integer number (22544941).

Almost surely, 2^45089881 is an apocalyptic number.

It is an amenable number.

45089881 is a deficient number, since it is larger than the sum of its proper divisors (1).

45089881 is an equidigital number, since it uses as much as digits as its factorization.

45089881 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 92160, while the sum is 43.

The square root of 45089881 is about 6714.8999247941. The cubic root of 45089881 is about 355.9259856441.

The spelling of 45089881 in words is "forty-five million, eighty-nine thousand, eight hundred eighty-one".