63215897 has 2 divisors, whose sum is σ = 63215898. Its totient is φ = 63215896.

The previous prime is 63215863. The next prime is 63215903. The reversal of 63215897 is 79851236.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 50993881 + 12222016 = 7141^2 + 3496^2 .

It is a cyclic number.

It is not a de Polignac number, because 63215897 - 2⁶ = 63215833 is a prime.

It is not a weakly prime, because it can be changed into another prime (63215837) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31607948 + 31607949.

It is an arithmetic number, because the mean of its divisors is an integer number (31607949).

Almost surely, 2^63215897 is an apocalyptic number.

It is an amenable number.

63215897 is a deficient number, since it is larger than the sum of its proper divisors (1).

63215897 is an equidigital number, since it uses as much as digits as its factorization.

63215897 is an evil number, because the sum of its binary digits is even.

The product of its digits is 90720, while the sum is 41.

The square root of 63215897 is about 7950.8425339708. The cubic root of 63215897 is about 398.3597351049.

The spelling of 63215897 in words is "sixty-three million, two hundred fifteen thousand, eight hundred ninety-seven".