91013458 has 16 divisors (see below), whose sum is σ = 148343040. Its totient is φ = 41720400.

The previous prime is 91013449. The next prime is 91013491. The reversal of 91013458 is 85431019.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 37453 + ... + 39808.

It is an arithmetic number, because the mean of its divisors is an integer number (9271440).

Almost surely, 2^91013458 is an apocalyptic number.

91013458 is a deficient number, since it is larger than the sum of its proper divisors (57329582).

91013458 is a wasteful number, since it uses less digits than its factorization.

91013458 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77313.

The product of its (nonzero) digits is 4320, while the sum is 31.

The square root of 91013458 is about 9540.0973789579. The cubic root of 91013458 is about 449.8163168030.

The spelling of 91013458 in words is "ninety-one million, thirteen thousand, four hundred fifty-eight".