63947497 has 2 divisors, whose sum is σ = 63947498. Its totient is φ = 63947496.

The previous prime is 63947467. The next prime is 63947503. The reversal of 63947497 is 79474936.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 62267881 + 1679616 = 7891^2 + 1296^2 .

It is a cyclic number.

It is not a de Polignac number, because 63947497 - 2¹⁵ = 63914729 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 63947497.

It is not a weakly prime, because it can be changed into another prime (63947417) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31973748 + 31973749.

It is an arithmetic number, because the mean of its divisors is an integer number (31973749).

Almost surely, 2^63947497 is an apocalyptic number.

It is an amenable number.

63947497 is a deficient number, since it is larger than the sum of its proper divisors (1).

63947497 is an equidigital number, since it uses as much as digits as its factorization.

63947497 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1143072, while the sum is 49.

The square root of 63947497 is about 7996.7178892343. The cubic root of 63947497 is about 399.8905888257.

The spelling of 63947497 in words is "sixty-three million, nine hundred forty-seven thousand, four hundred ninety-seven".