42313279 has 2 divisors, whose sum is σ = 42313280. Its totient is φ = 42313278.

The previous prime is 42313259. The next prime is 42313283. The reversal of 42313279 is 97231324.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 42313279 - 2¹¹ = 42311231 is a prime.

It is equal to p_2565571 and since 42313279 and 2565571 have the same sum of digits, it is a Honaker prime.

It is a self number, because there is not a number n which added to its sum of digits gives 42313279.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42313259) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21156639 + 21156640.

It is an arithmetic number, because the mean of its divisors is an integer number (21156640).

Almost surely, 2^42313279 is an apocalyptic number.

42313279 is a deficient number, since it is larger than the sum of its proper divisors (1).

42313279 is an equidigital number, since it uses as much as digits as its factorization.

42313279 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9072, while the sum is 31.

The square root of 42313279 is about 6504.8657941575. The cubic root of 42313279 is about 348.4647833570.

The spelling of 42313279 in words is "forty-two million, three hundred thirteen thousand, two hundred seventy-nine".