253456389 has 24 divisors (see below), whose sum is σ = 388514880. Its totient is φ = 158877312.

The previous prime is 253456387. The next prime is 253456391. The reversal of 253456389 is 983654352.

253456389 is a `hidden beast` number, since 2 + 5 + 3 + 4 + 5 + 638 + 9 = 666.

It is an interprime number because it is at equal distance from previous prime (253456387) and next prime (253456391).

It is not a de Polignac number, because 253456389 - 2¹ = 253456387 is a prime.

It is a super-2 number, since 2×253456389² = 128480282249838642, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (253456381) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1837 + ... + 22589.

It is an arithmetic number, because the mean of its divisors is an integer number (16188120).

Almost surely, 2^253456389 is an apocalyptic number.

It is an amenable number.

253456389 is a deficient number, since it is larger than the sum of its proper divisors (135058491).

253456389 is a wasteful number, since it uses less digits than its factorization.

253456389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20841 (or 20838 counting only the distinct ones).

The product of its digits is 777600, while the sum is 45.

The square root of 253456389 is about 15920.3137217832. The cubic root of 253456389 is about 632.8504322319.

The spelling of 253456389 in words is "two hundred fifty-three million, four hundred fifty-six thousand, three hundred eighty-nine".