63709873 has 2 divisors, whose sum is σ = 63709874. Its totient is φ = 63709872.

The previous prime is 63709853. The next prime is 63709883. The reversal of 63709873 is 37890736.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 54272689 + 9437184 = 7367^2 + 3072^2 .

It is a cyclic number.

It is not a de Polignac number, because 63709873 - 2¹³ = 63701681 is a prime.

It is a super-2 number, since 2×63709873² = 8117895835352258, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (63709813) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31854936 + 31854937.

It is an arithmetic number, because the mean of its divisors is an integer number (31854937).

Almost surely, 2^63709873 is an apocalyptic number.

It is an amenable number.

63709873 is a deficient number, since it is larger than the sum of its proper divisors (1).

63709873 is an equidigital number, since it uses as much as digits as its factorization.

63709873 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 190512, while the sum is 43.

The square root of 63709873 is about 7981.8464655742. The cubic root of 63709873 is about 399.3946531000.

The spelling of 63709873 in words is "sixty-three million, seven hundred nine thousand, eight hundred seventy-three".