1208407631 has 2 divisors, whose sum is σ = 1208407632. Its totient is φ = 1208407630.

The previous prime is 1208407609. The next prime is 1208407633. The reversal of 1208407631 is 1367048021.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1208407631 - 2¹⁰ = 1208406607 is a prime.

It is a super-2 number, since 2×1208407631² = 2920498005318064322, which contains 22 as substring.

It is a Sophie Germain prime.

Together with 1208407633, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1208407633) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 604203815 + 604203816.

It is an arithmetic number, because the mean of its divisors is an integer number (604203816).

Almost surely, 2^1208407631 is an apocalyptic number.

1208407631 is a deficient number, since it is larger than the sum of its proper divisors (1).

1208407631 is an equidigital number, since it uses as much as digits as its factorization.

1208407631 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8064, while the sum is 32.

The square root of 1208407631 is about 34762.1580313996. The cubic root of 1208407631 is about 1065.1345847389.

The spelling of 1208407631 in words is "one billion, two hundred eight million, four hundred seven thousand, six hundred thirty-one".