91012968 has 48 divisors (see below), whose sum is σ = 260996580. Its totient is φ = 28552704.

The previous prime is 91012967. The next prime is 91013003. The reversal of 91012968 is 86921019.

It can be written as a sum of positive squares in 2 ways, for example, as 89529444 + 1483524 = 9462^2 + 1218^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (91012967) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 35955 + ... + 38402.

Almost surely, 2^91012968 is an apocalyptic number.

It is an amenable number.

91012968 is an abundant number, since it is smaller than the sum of its proper divisors (169983612).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

91012968 is a wasteful number, since it uses less digits than its factorization.

91012968 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74386 (or 74379 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 36.

The square root of 91012968 is about 9540.0716978438. The cubic root of 91012968 is about 449.8155095584.

The spelling of 91012968 in words is "ninety-one million, twelve thousand, nine hundred sixty-eight".