965963621 has 4 divisors (see below), whose sum is σ = 1103958432. Its totient is φ = 827968812.

The previous prime is 965963597. The next prime is 965963623. The reversal of 965963621 is 126369569.

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 965963621 - 2¹⁴ = 965947237 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 (965963623) 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, 68997395 + ... + 68997408.

It is an arithmetic number, because the mean of its divisors is an integer number (275989608).

Almost surely, 2^965963621 is an apocalyptic number.

It is an amenable number.

965963621 is a deficient number, since it is larger than the sum of its proper divisors (137994811).

965963621 is a wasteful number, since it uses less digits than its factorization.

965963621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137994810.

The product of its digits is 524880, while the sum is 47.

The square root of 965963621 is about 31079.9552927606. The cubic root of 965963621 is about 988.5233302643.

The spelling of 965963621 in words is "nine hundred sixty-five million, nine hundred sixty-three thousand, six hundred twenty-one".