91000700 has 72 divisors (see below), whose sum is σ = 228985344. Its totient is φ = 30744000.

The previous prime is 91000699. The next prime is 91000727. The reversal of 91000700 is 700019.

It is a super-2 number, since 2×91000700² = 16562254800980000, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 48785 + ... + 50615.

It is an arithmetic number, because the mean of its divisors is an integer number (3180352).

Almost surely, 2^91000700 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 91000700, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (114492672).

91000700 is an abundant number, since it is smaller than the sum of its proper divisors (137984644).

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

91000700 is a wasteful number, since it uses less digits than its factorization.

91000700 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1923 (or 1916 counting only the distinct ones).

The product of its (nonzero) digits is 63, while the sum is 17.

The square root of 91000700 is about 9539.4287040682. The cubic root of 91000700 is about 449.7952978429.

Adding to 91000700 its reverse (700019), we get a palindrome (91700719).

The spelling of 91000700 in words is "ninety-one million, seven hundred", and thus it is an aban number.