91945258 has 8 divisors (see below), whose sum is σ = 138098628. Its totient is φ = 45912384.

The previous prime is 91945253. The next prime is 91945267. The reversal of 91945258 is 85254919.

It can be written as a sum of positive squares in 2 ways, for example, as 89245809 + 2699449 = 9447^2 + 1643^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (91945253) 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, 28191 + ... + 31282.

Almost surely, 2^91945258 is an apocalyptic number.

91945258 is a deficient number, since it is larger than the sum of its proper divisors (46153370).

91945258 is a wasteful number, since it uses less digits than its factorization.

91945258 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60248.

The product of its digits is 129600, while the sum is 43.

The square root of 91945258 is about 9588.8089979934. The cubic root of 91945258 is about 451.3461877554.

The spelling of 91945258 in words is "ninety-one million, nine hundred forty-five thousand, two hundred fifty-eight".