632649139 has 2 divisors, whose sum is σ = 632649140. Its totient is φ = 632649138.

The previous prime is 632649133. The next prime is 632649179. The reversal of 632649139 is 931946236.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 632649139 - 2³ = 632649131 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 632649095 and 632649104.

It is not a weakly prime, because it can be changed into another prime (632649131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 316324569 + 316324570.

It is an arithmetic number, because the mean of its divisors is an integer number (316324570).

Almost surely, 2^632649139 is an apocalyptic number.

632649139 is a deficient number, since it is larger than the sum of its proper divisors (1).

632649139 is an equidigital number, since it uses as much as digits as its factorization.

632649139 is an evil number, because the sum of its binary digits is even.

The product of its digits is 209952, while the sum is 43.

The square root of 632649139 is about 25152.5175479513. The cubic root of 632649139 is about 858.4617983566.

The spelling of 632649139 in words is "six hundred thirty-two million, six hundred forty-nine thousand, one hundred thirty-nine".