964379621 has 4 divisors (see below), whose sum is σ = 1021107852. Its totient is φ = 907651392.

The previous prime is 964379617. The next prime is 964379653. The reversal of 964379621 is 126973469.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 274266721 + 690112900 = 16561^2 + 26270^2 .

It is a cyclic number.

It is not a de Polignac number, because 964379621 - 2² = 964379617 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 (964379681) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28364090 + ... + 28364123.

It is an arithmetic number, because the mean of its divisors is an integer number (255276963).

Almost surely, 2^964379621 is an apocalyptic number.

It is an amenable number.

964379621 is a deficient number, since it is larger than the sum of its proper divisors (56728231).

964379621 is a wasteful number, since it uses less digits than its factorization.

964379621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56728230.

The product of its digits is 489888, while the sum is 47.

The square root of 964379621 is about 31054.4621753461. The cubic root of 964379621 is about 987.9827034103.

The spelling of 964379621 in words is "nine hundred sixty-four million, three hundred seventy-nine thousand, six hundred twenty-one".