262630139 has 2 divisors, whose sum is σ = 262630140. Its totient is φ = 262630138.

The previous prime is 262630117. The next prime is 262630153. The reversal of 262630139 is 931036262.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-262630139 is a prime.

It is a super-2 number, since 2×262630139² = 137949179822318642, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (262630339) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 131315069 + 131315070.

It is an arithmetic number, because the mean of its divisors is an integer number (131315070).

Almost surely, 2^262630139 is an apocalyptic number.

262630139 is a deficient number, since it is larger than the sum of its proper divisors (1).

262630139 is an equidigital number, since it uses as much as digits as its factorization.

262630139 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11664, while the sum is 32.

The square root of 262630139 is about 16205.8674251026. The cubic root of 262630139 is about 640.3953766265.

The spelling of 262630139 in words is "two hundred sixty-two million, six hundred thirty thousand, one hundred thirty-nine".