298987631 has 2 divisors, whose sum is σ = 298987632. Its totient is φ = 298987630.

The previous prime is 298987627. The next prime is 298987669. The reversal of 298987631 is 136789892.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 298987631 - 2² = 298987627 is a prime.

It is a super-2 number, since 2×298987631² = 178787206981984322, which contains 22 as substring.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (298987691) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 149493815 + 149493816.

It is an arithmetic number, because the mean of its divisors is an integer number (149493816).

Almost surely, 2^298987631 is an apocalyptic number.

298987631 is a deficient number, since it is larger than the sum of its proper divisors (1).

298987631 is an equidigital number, since it uses as much as digits as its factorization.

298987631 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1306368, while the sum is 53.

The square root of 298987631 is about 17291.2588032219. The cubic root of 298987631 is about 668.6790868296.

The spelling of 298987631 in words is "two hundred ninety-eight million, nine hundred eighty-seven thousand, six hundred thirty-one".