63897115417 has 2 divisors, whose sum is σ = 63897115418. Its totient is φ = 63897115416.

The previous prime is 63897115379. The next prime is 63897115427. The reversal of 63897115417 is 71451179836.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 63211513561 + 685601856 = 251419^2 + 26184^2 .

It is a cyclic number.

It is not a de Polignac number, because 63897115417 - 2¹¹ = 63897113369 is a prime.

It is a super-2 number, since 2×63897115417² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (63897115427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31948557708 + 31948557709.

It is an arithmetic number, because the mean of its divisors is an integer number (31948557709).

Almost surely, 2^63897115417 is an apocalyptic number.

It is an amenable number.

63897115417 is a deficient number, since it is larger than the sum of its proper divisors (1).

63897115417 is an equidigital number, since it uses as much as digits as its factorization.

63897115417 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1270080, while the sum is 52.

The spelling of 63897115417 in words is "sixty-three billion, eight hundred ninety-seven million, one hundred fifteen thousand, four hundred seventeen".