631430741 has 2 divisors, whose sum is σ = 631430742. Its totient is φ = 631430740.

The previous prime is 631430731. The next prime is 631430747. The reversal of 631430741 is 147034136.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 444999025 + 186431716 = 21095^2 + 13654^2 .

It is a cyclic number.

It is not a de Polignac number, because 631430741 - 2¹⁸ = 631168597 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (631430747) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 315715370 + 315715371.

It is an arithmetic number, because the mean of its divisors is an integer number (315715371).

Almost surely, 2^631430741 is an apocalyptic number.

It is an amenable number.

631430741 is a deficient number, since it is larger than the sum of its proper divisors (1).

631430741 is an equidigital number, since it uses as much as digits as its factorization.

631430741 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6048, while the sum is 29.

The square root of 631430741 is about 25128.2856757082. The cubic root of 631430741 is about 857.9103498283.

Adding to 631430741 its reverse (147034136), we get a palindrome (778464877).

The spelling of 631430741 in words is "six hundred thirty-one million, four hundred thirty thousand, seven hundred forty-one".