91450057 has 4 divisors (see below), whose sum is σ = 91576576. Its totient is φ = 91323540.

The previous prime is 91450043. The next prime is 91450061. The reversal of 91450057 is 75005419.

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 a de Polignac number, because none of the positive numbers 2^k-91450057 is a prime.

It is a super-2 number, since 2×91450057² = 16726225850606498, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (91450027) 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, 62169 + ... + 63622.

It is an arithmetic number, because the mean of its divisors is an integer number (22894144).

Almost surely, 2^91450057 is an apocalyptic number.

It is an amenable number.

91450057 is a deficient number, since it is larger than the sum of its proper divisors (126519).

91450057 is a wasteful number, since it uses less digits than its factorization.

91450057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 126518.

The product of its (nonzero) digits is 6300, while the sum is 31.

The square root of 91450057 is about 9562.9523160999. The cubic root of 91450057 is about 450.5344382791.

The spelling of 91450057 in words is "ninety-one million, four hundred fifty thousand, fifty-seven".