91087936 has 21 divisors (see below), whose sum is σ = 180904261. Its totient is φ = 45505792.

The previous prime is 91087933. The next prime is 91087939. The reversal of 91087936 is 63978019.

The square root of 91087936 is 9544.

It is a perfect power (a square), and thus also a powerful number.

It is an interprime number because it is at equal distance from previous prime (91087933) and next prime (91087939).

It can be written as a sum of positive squares in only one way, i.e., 46785600 + 44302336 = 6840^2 + 6656^2 .

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 91087892 and 91087901.

It is not an unprimeable number, because it can be changed into a prime (91087933) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 75756 + ... + 76948.

Almost surely, 2^91087936 is an apocalyptic number.

91087936 is the 9544-th square number.

It is an amenable number.

91087936 is a deficient number, since it is larger than the sum of its proper divisors (89816325).

91087936 is an frugal number, since it uses more digits than its factorization.

91087936 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2398 (or 1195 counting only the distinct ones).

The product of its (nonzero) digits is 81648, while the sum is 43.

The cubic root of 91087936 is about 449.9389810268.

The spelling of 91087936 in words is "ninety-one million, eighty-seven thousand, nine hundred thirty-six".