63739121 has 2 divisors, whose sum is σ = 63739122. Its totient is φ = 63739120.

The previous prime is 63739111. The next prime is 63739189. The reversal of 63739121 is 12193736.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 41460721 + 22278400 = 6439^2 + 4720^2 .

It is a cyclic number.

It is not a de Polignac number, because 63739121 - 2¹⁸ = 63476977 is a prime.

It is not a weakly prime, because it can be changed into another prime (63739111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31869560 + 31869561.

It is an arithmetic number, because the mean of its divisors is an integer number (31869561).

Almost surely, 2^63739121 is an apocalyptic number.

It is an amenable number.

63739121 is a deficient number, since it is larger than the sum of its proper divisors (1).

63739121 is an equidigital number, since it uses as much as digits as its factorization.

63739121 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6804, while the sum is 32.

The square root of 63739121 is about 7983.6784128621. The cubic root of 63739121 is about 399.4557619315.

The spelling of 63739121 in words is "sixty-three million, seven hundred thirty-nine thousand, one hundred twenty-one".