1679634431 has 2 divisors, whose sum is σ = 1679634432. Its totient is φ = 1679634430.

The previous prime is 1679634427. The next prime is 1679634449. The reversal of 1679634431 is 1344369761.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1679634431 - 2² = 1679634427 is a prime.

It is a super-2 number, since 2×1679634431² = 5642343643601387522, 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 (1679634421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 839817215 + 839817216.

It is an arithmetic number, because the mean of its divisors is an integer number (839817216).

Almost surely, 2^1679634431 is an apocalyptic number.

1679634431 is a deficient number, since it is larger than the sum of its proper divisors (1).

1679634431 is an equidigital number, since it uses as much as digits as its factorization.

1679634431 is an evil number, because the sum of its binary digits is even.

The product of its digits is 326592, while the sum is 44.

The square root of 1679634431 is about 40983.3433360432. The cubic root of 1679634431 is about 1188.6981575672.

The spelling of 1679634431 in words is "one billion, six hundred seventy-nine million, six hundred thirty-four thousand, four hundred thirty-one".