342399947 has 2 divisors, whose sum is σ = 342399948. Its totient is φ = 342399946.

The previous prime is 342399923. The next prime is 342399973. The reversal of 342399947 is 749993243.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 342399947 - 2¹⁰ = 342398923 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 342399895 and 342399904.

It is not a weakly prime, because it can be changed into another prime (342399047) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 171199973 + 171199974.

It is an arithmetic number, because the mean of its divisors is an integer number (171199974).

Almost surely, 2^342399947 is an apocalyptic number.

342399947 is a deficient number, since it is larger than the sum of its proper divisors (1).

342399947 is an equidigital number, since it uses as much as digits as its factorization.

342399947 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1469664, while the sum is 50.

The square root of 342399947 is about 18504.0521778339. The cubic root of 342399947 is about 699.5915624105.

The spelling of 342399947 in words is "three hundred forty-two million, three hundred ninety-nine thousand, nine hundred forty-seven".