342991631 has 2 divisors, whose sum is σ = 342991632. Its totient is φ = 342991630.

The previous prime is 342991601. The next prime is 342991639. The reversal of 342991631 is 136199243.

It is a strong prime.

It is an emirp because it is prime and its reverse (136199243) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 342991631 - 2¹⁴ = 342975247 is a prime.

It is a super-2 number, since 2×342991631² = 235286517872080322, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (342991639) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 171495815 + 171495816.

It is an arithmetic number, because the mean of its divisors is an integer number (171495816).

Almost surely, 2^342991631 is an apocalyptic number.

342991631 is a deficient number, since it is larger than the sum of its proper divisors (1).

342991631 is an equidigital number, since it uses as much as digits as its factorization.

342991631 is an evil number, because the sum of its binary digits is even.

The product of its digits is 34992, while the sum is 38.

The square root of 342991631 is about 18520.0332343114. The cubic root of 342991631 is about 699.9943067564.

The spelling of 342991631 in words is "three hundred forty-two million, nine hundred ninety-one thousand, six hundred thirty-one".