91085914 has 4 divisors (see below), whose sum is σ = 136628874. Its totient is φ = 45542956.

The previous prime is 91085903. The next prime is 91085923. The reversal of 91085914 is 41958019.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 81270225 + 9815689 = 9015^2 + 3133^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22771477 + ... + 22771480.

Almost surely, 2^91085914 is an apocalyptic number.

91085914 is a deficient number, since it is larger than the sum of its proper divisors (45542960).

91085914 is a wasteful number, since it uses less digits than its factorization.

91085914 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45542959.

The product of its (nonzero) digits is 12960, while the sum is 37.

The square root of 91085914 is about 9543.8940689846. The cubic root of 91085914 is about 449.9356517042.

The spelling of 91085914 in words is "ninety-one million, eighty-five thousand, nine hundred fourteen".