495621239 has 2 divisors, whose sum is σ = 495621240. Its totient is φ = 495621238.

The previous prime is 495621229. The next prime is 495621307. The reversal of 495621239 is 932126594.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-495621239 is a prime.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 495621196 and 495621205.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (495621229) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 247810619 + 247810620.

It is an arithmetic number, because the mean of its divisors is an integer number (247810620).

Almost surely, 2^495621239 is an apocalyptic number.

495621239 is a deficient number, since it is larger than the sum of its proper divisors (1).

495621239 is an equidigital number, since it uses as much as digits as its factorization.

495621239 is an evil number, because the sum of its binary digits is even.

The product of its digits is 116640, while the sum is 41.

The square root of 495621239 is about 22262.5523918530. The cubic root of 495621239 is about 791.3767793647.

The spelling of 495621239 in words is "four hundred ninety-five million, six hundred twenty-one thousand, two hundred thirty-nine".