91000964 has 6 divisors (see below), whose sum is σ = 159251694. Its totient is φ = 45500480.

The previous prime is 91000963. The next prime is 91000979. The reversal of 91000964 is 46900019.

It can be written as a sum of positive squares in only one way, i.e., 89151364 + 1849600 = 9442^2 + 1360^2 .

It is not an unprimeable number, because it can be changed into a prime (91000963) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11375117 + ... + 11375124.

It is an arithmetic number, because the mean of its divisors is an integer number (26541949).

Almost surely, 2^91000964 is an apocalyptic number.

It is an amenable number.

91000964 is a deficient number, since it is larger than the sum of its proper divisors (68250730).

91000964 is a wasteful number, since it uses less digits than its factorization.

91000964 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22750245 (or 22750243 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 29.

The square root of 91000964 is about 9539.4425413648. The cubic root of 91000964 is about 449.7957328060.

The spelling of 91000964 in words is "ninety-one million, nine hundred sixty-four", and thus it is an aban number.