253991677 has 4 divisors (see below), whose sum is σ = 267359680. Its totient is φ = 240623676.

The previous prime is 253991659. The next prime is 253991693. The reversal of 253991677 is 776199352.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 253991677 - 2²³ = 245603069 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 253991677.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (253991977) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6683973 + ... + 6684010.

It is an arithmetic number, because the mean of its divisors is an integer number (66839920).

Almost surely, 2^253991677 is an apocalyptic number.

It is an amenable number.

253991677 is a deficient number, since it is larger than the sum of its proper divisors (13368003).

253991677 is a wasteful number, since it uses less digits than its factorization.

253991677 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13368002.

The product of its digits is 714420, while the sum is 49.

The square root of 253991677 is about 15937.1163326368. The cubic root of 253991677 is about 633.2956357679.

The spelling of 253991677 in words is "two hundred fifty-three million, nine hundred ninety-one thousand, six hundred seventy-seven".