964630921 has 4 divisors (see below), whose sum is σ = 978217344. Its totient is φ = 951044500.

The previous prime is 964630907. The next prime is 964630939. The reversal of 964630921 is 129036469.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 964630921 - 2¹⁵ = 964598153 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (964630991) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6793105 + ... + 6793246.

It is an arithmetic number, because the mean of its divisors is an integer number (244554336).

Almost surely, 2^964630921 is an apocalyptic number.

It is an amenable number.

964630921 is a deficient number, since it is larger than the sum of its proper divisors (13586423).

964630921 is a wasteful number, since it uses less digits than its factorization.

964630921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13586422.

The product of its (nonzero) digits is 69984, while the sum is 40.

The square root of 964630921 is about 31058.5080292019. The cubic root of 964630921 is about 988.0685128037.

The spelling of 964630921 in words is "nine hundred sixty-four million, six hundred thirty thousand, nine hundred twenty-one".