91087372 has 12 divisors (see below), whose sum is σ = 160294680. Its totient is φ = 45288896.

The previous prime is 91087369. The next prime is 91087417. The reversal of 91087372 is 27378019.

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 3 ways as a sum of consecutive naturals, for example, 62893 + ... + 64324.

It is an arithmetic number, because the mean of its divisors is an integer number (13357890).

Almost surely, 2^91087372 is an apocalyptic number.

It is an amenable number.

91087372 is a deficient number, since it is larger than the sum of its proper divisors (69207308).

91087372 is a wasteful number, since it uses less digits than its factorization.

91087372 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 127400 (or 127398 counting only the distinct ones).

The product of its (nonzero) digits is 21168, while the sum is 37.

The square root of 91087372 is about 9543.9704525947. The cubic root of 91087372 is about 449.9380523779.

It can be divided in two parts, 9108 and 7372, that multiplied together give a palindrome (67144176).

The spelling of 91087372 in words is "ninety-one million, eighty-seven thousand, three hundred seventy-two".