297242139 has 16 divisors (see below), whose sum is σ = 402603264. Its totient is φ = 195031200.

The previous prime is 297242129. The next prime is 297242159. The reversal of 297242139 is 931242792.

It is not a de Polignac number, because 297242139 - 2⁴ = 297242123 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 297242097 and 297242106.

It is not an unprimeable number, because it can be changed into a prime (297242129) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 199692 + ... + 201174.

It is an arithmetic number, because the mean of its divisors is an integer number (25162704).

Almost surely, 2^297242139 is an apocalyptic number.

297242139 is a deficient number, since it is larger than the sum of its proper divisors (105361125).

297242139 is a wasteful number, since it uses less digits than its factorization.

297242139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2498.

The product of its digits is 54432, while the sum is 39.

The square root of 297242139 is about 17240.7116732460. The cubic root of 297242139 is about 667.3752951960.

The spelling of 297242139 in words is "two hundred ninety-seven million, two hundred forty-two thousand, one hundred thirty-nine".