964553021 has 16 divisors (see below), whose sum is σ = 1064294640. Its totient is φ = 870051840.

The previous prime is 964553011. The next prime is 964553027. The reversal of 964553021 is 120355469.

It can be written as a sum of positive squares in 8 ways, for example, as 31922500 + 932630521 = 5650^2 + 30539^2 .

It is not a de Polignac number, because 964553021 - 2¹⁴ = 964536637 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (964553027) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 60401 + ... + 74681.

It is an arithmetic number, because the mean of its divisors is an integer number (66518415).

Almost surely, 2^964553021 is an apocalyptic number.

It is an amenable number.

964553021 is a deficient number, since it is larger than the sum of its proper divisors (99741619).

964553021 is a wasteful number, since it uses less digits than its factorization.

964553021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14464.

The product of its (nonzero) digits is 32400, while the sum is 35.

The square root of 964553021 is about 31057.2539191732. The cubic root of 964553021 is about 988.0419145101.

The spelling of 964553021 in words is "nine hundred sixty-four million, five hundred fifty-three thousand, twenty-one".