63121965 has 8 divisors (see below), whose sum is σ = 100995168. Its totient is φ = 33665040.

The previous prime is 63121943. The next prime is 63122011. The reversal of 63121965 is 56912136.

It is a happy number.

63121965 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 63121965 - 2¹² = 63117869 is a prime.

It is a super-2 number, since 2×63121965² = 7968764930922450, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2104051 + ... + 2104080.

It is an arithmetic number, because the mean of its divisors is an integer number (12624396).

Almost surely, 2^63121965 is an apocalyptic number.

It is an amenable number.

63121965 is a deficient number, since it is larger than the sum of its proper divisors (37873203).

63121965 is a wasteful number, since it uses less digits than its factorization.

63121965 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4208139.

The product of its digits is 9720, while the sum is 33.

The square root of 63121965 is about 7944.9332910982. The cubic root of 63121965 is about 398.1623307751.

The spelling of 63121965 in words is "sixty-three million, one hundred twenty-one thousand, nine hundred sixty-five".