963940621 has 4 divisors (see below), whose sum is σ = 1101646432. Its totient is φ = 826234812.

The previous prime is 963940609. The next prime is 963940633. The reversal of 963940621 is 126049369.

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 an interprime number because it is at equal distance from previous prime (963940609) and next prime (963940633).

It is a cyclic number.

It is not a de Polignac number, because 963940621 - 2⁷ = 963940493 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 (963940321) 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, 68852895 + ... + 68852908.

It is an arithmetic number, because the mean of its divisors is an integer number (275411608).

Almost surely, 2^963940621 is an apocalyptic number.

It is an amenable number.

963940621 is a deficient number, since it is larger than the sum of its proper divisors (137705811).

963940621 is a wasteful number, since it uses less digits than its factorization.

963940621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137705810.

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

The square root of 963940621 is about 31047.3931433865. The cubic root of 963940621 is about 987.8327658316.

The spelling of 963940621 in words is "nine hundred sixty-three million, nine hundred forty thousand, six hundred twenty-one".