630873869 has 2 divisors, whose sum is σ = 630873870. Its totient is φ = 630873868.

The previous prime is 630873863. The next prime is 630873883. The reversal of 630873869 is 968378036.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 621903844 + 8970025 = 24938^2 + 2995^2 .

It is a cyclic number.

It is not a de Polignac number, because 630873869 - 2⁸ = 630873613 is a prime.

It is a super-2 number, since 2×630873869² = 796003677174058322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (630873863) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 315436934 + 315436935.

It is an arithmetic number, because the mean of its divisors is an integer number (315436935).

Almost surely, 2^630873869 is an apocalyptic number.

It is an amenable number.

630873869 is a deficient number, since it is larger than the sum of its proper divisors (1).

630873869 is an equidigital number, since it uses as much as digits as its factorization.

630873869 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1306368, while the sum is 50.

The square root of 630873869 is about 25117.2026507730. The cubic root of 630873869 is about 857.6580726136.

The spelling of 630873869 in words is "six hundred thirty million, eight hundred seventy-three thousand, eight hundred sixty-nine".