253421679 has 12 divisors (see below), whose sum is σ = 393062424. Its totient is φ = 144812304.

The previous prime is 253421657. The next prime is 253421681. The reversal of 253421679 is 976124352.

It is not a de Polignac number, because 253421679 - 2⁷ = 253421551 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (253421699) 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, 861832 + ... + 862125.

It is an arithmetic number, because the mean of its divisors is an integer number (32755202).

Almost surely, 2^253421679 is an apocalyptic number.

253421679 is a deficient number, since it is larger than the sum of its proper divisors (139640745).

253421679 is a wasteful number, since it uses less digits than its factorization.

253421679 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1723974 (or 1723967 counting only the distinct ones).

The product of its digits is 90720, while the sum is 39.

The square root of 253421679 is about 15919.2235677498. The cubic root of 253421679 is about 632.8215420004.

The spelling of 253421679 in words is "two hundred fifty-three million, four hundred twenty-one thousand, six hundred seventy-nine".