91007650 has 12 divisors (see below), whose sum is σ = 169274322. Its totient is φ = 36403040.

The previous prime is 91007639. The next prime is 91007671. The reversal of 91007650 is 5670019.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 83229129 + 7778521 = 9123^2 + 2789^2 .

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 5 ways as a sum of consecutive naturals, for example, 910027 + ... + 910126.

Almost surely, 2^91007650 is an apocalyptic number.

91007650 is a deficient number, since it is larger than the sum of its proper divisors (78266672).

91007650 is a wasteful number, since it uses less digits than its factorization.

91007650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1820165 (or 1820160 counting only the distinct ones).

The product of its (nonzero) digits is 1890, while the sum is 28.

The square root of 91007650 is about 9539.7929746929. The cubic root of 91007650 is about 449.8067482960.

Adding to 91007650 its reverse (5670019), we get a palindrome (96677669).

The spelling of 91007650 in words is "ninety-one million, seven thousand, six hundred fifty".