91050690 has 32 divisors (see below), whose sum is σ = 218920320. Its totient is φ = 24235904.

The previous prime is 91050683. The next prime is 91050719. The reversal of 91050690 is 9605019.

It is a super-2 number, since 2×91050690² = 16580456298952200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16051 + ... + 20969.

It is an arithmetic number, because the mean of its divisors is an integer number (6841260).

Almost surely, 2^91050690 is an apocalyptic number.

91050690 is an abundant number, since it is smaller than the sum of its proper divisors (127869630).

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

91050690 is a wasteful number, since it uses less digits than its factorization.

91050690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5546.

The product of its (nonzero) digits is 2430, while the sum is 30.

The square root of 91050690 is about 9542.0485221990. The cubic root of 91050690 is about 449.8776457474.

The spelling of 91050690 in words is "ninety-one million, fifty thousand, six hundred ninety".