253861797 has 12 divisors (see below), whose sum is σ = 393745056. Its totient is φ = 145063800.

The previous prime is 253861781. The next prime is 253861819. The reversal of 253861797 is 797168352.

It is not a de Polignac number, because 253861797 - 2⁴ = 253861781 is a prime.

It is a Smith number, since the sum of its digits (48) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (253861297) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 863329 + ... + 863622.

It is an arithmetic number, because the mean of its divisors is an integer number (32812088).

Almost surely, 2^253861797 is an apocalyptic number.

It is an amenable number.

253861797 is a deficient number, since it is larger than the sum of its proper divisors (139883259).

253861797 is a wasteful number, since it uses less digits than its factorization.

253861797 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1726968 (or 1726961 counting only the distinct ones).

The product of its digits is 635040, while the sum is 48.

The square root of 253861797 is about 15933.0410468310. The cubic root of 253861797 is about 633.1876709949.

The spelling of 253861797 in words is "two hundred fifty-three million, eight hundred sixty-one thousand, seven hundred ninety-seven".