253398639 has 12 divisors (see below), whose sum is σ = 363997256. Its totient is φ = 155876448.

The previous prime is 253398601. The next prime is 253398641. The reversal of 253398639 is 936893352.

It is not a de Polignac number, because 253398639 - 2⁹ = 253398127 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (253398689) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 98137 + ... + 100685.

Almost surely, 2^253398639 is an apocalyptic number.

253398639 is a deficient number, since it is larger than the sum of its proper divisors (110598617).

253398639 is an frugal number, since it uses more digits than its factorization.

253398639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5114 (or 2565 counting only the distinct ones).

The product of its digits is 1049760, while the sum is 48.

The square root of 253398639 is about 15918.4998979175. The cubic root of 253398639 is about 632.8023636224.

The spelling of 253398639 in words is "two hundred fifty-three million, three hundred ninety-eight thousand, six hundred thirty-nine".