963621 has 6 divisors (see below), whose sum is σ = 1391910. Its totient is φ = 642408.

The previous prime is 963607. The next prime is 963629. The reversal of 963621 is 126369.

It is a happy number.

963621 is a `hidden beast` number, since 9 + 636 + 21 = 666.

963621 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 950625 + 12996 = 975^2 + 114^2 .

It is a de Polignac number, because none of the positive numbers 2^k-963621 is a prime.

963621 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (963629) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 53526 + ... + 53543.

It is an arithmetic number, because the mean of its divisors is an integer number (231985).

2⁹⁶³⁶²¹ is an apocalyptic number.

It is an amenable number.

963621 is a deficient number, since it is larger than the sum of its proper divisors (428289).

963621 is a wasteful number, since it uses less digits than its factorization.

963621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 107075 (or 107072 counting only the distinct ones).

The product of its digits is 1944, while the sum is 27.

The square root of 963621 is about 981.6419917669. The cubic root of 963621 is about 98.7723572730.

The spelling of 963621 in words is "nine hundred sixty-three thousand, six hundred twenty-one".