964555091 has 4 divisors (see below), whose sum is σ = 970698912. Its totient is φ = 958411272.

The previous prime is 964555087. The next prime is 964555169. The reversal of 964555091 is 190555469.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 190555469 = 13 ⋅14658113.

It is a cyclic number.

It is not a de Polignac number, because 964555091 - 2² = 964555087 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (964555001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3071675 + ... + 3071988.

It is an arithmetic number, because the mean of its divisors is an integer number (242674728).

Almost surely, 2^964555091 is an apocalyptic number.

964555091 is a deficient number, since it is larger than the sum of its proper divisors (6143821).

964555091 is a wasteful number, since it uses less digits than its factorization.

964555091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6143820.

The product of its (nonzero) digits is 243000, while the sum is 44.

The square root of 964555091 is about 31057.2872447031. The cubic root of 964555091 is about 988.0426213126.

The spelling of 964555091 in words is "nine hundred sixty-four million, five hundred fifty-five thousand, ninety-one".