63969161 has 2 divisors, whose sum is σ = 63969162. Its totient is φ = 63969160.

The previous prime is 63969137. The next prime is 63969173. The reversal of 63969161 is 16196936.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 49000000 + 14969161 = 7000^2 + 3869^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-63969161 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (63969761) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31984580 + 31984581.

It is an arithmetic number, because the mean of its divisors is an integer number (31984581).

Almost surely, 2^63969161 is an apocalyptic number.

It is an amenable number.

63969161 is a deficient number, since it is larger than the sum of its proper divisors (1).

63969161 is an equidigital number, since it uses as much as digits as its factorization.

63969161 is an evil number, because the sum of its binary digits is even.

The product of its digits is 52488, while the sum is 41.

The square root of 63969161 is about 7998.0723302556. The cubic root of 63969161 is about 399.9357417611.

The spelling of 63969161 in words is "sixty-three million, nine hundred sixty-nine thousand, one hundred sixty-one".