63615947 has 2 divisors, whose sum is σ = 63615948. Its totient is φ = 63615946.

The previous prime is 63615943. The next prime is 63615973. The reversal of 63615947 is 74951636.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 63615947 - 2² = 63615943 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (63615941) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31807973 + 31807974.

It is an arithmetic number, because the mean of its divisors is an integer number (31807974).

Almost surely, 2^63615947 is an apocalyptic number.

63615947 is a deficient number, since it is larger than the sum of its proper divisors (1).

63615947 is an equidigital number, since it uses as much as digits as its factorization.

63615947 is an evil number, because the sum of its binary digits is even.

The product of its digits is 136080, while the sum is 41.

The square root of 63615947 is about 7975.9605691102. The cubic root of 63615947 is about 399.1982837847.

The spelling of 63615947 in words is "sixty-three million, six hundred fifteen thousand, nine hundred forty-seven".