253421479 has 4 divisors (see below), whose sum is σ = 254976376. Its totient is φ = 251866584.

The previous prime is 253421453. The next prime is 253421491. The reversal of 253421479 is 974124352.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 253421479 - 2⁵ = 253421447 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 (253421419) 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, 777204 + ... + 777529.

It is an arithmetic number, because the mean of its divisors is an integer number (63744094).

Almost surely, 2^253421479 is an apocalyptic number.

253421479 is a deficient number, since it is larger than the sum of its proper divisors (1554897).

253421479 is a wasteful number, since it uses less digits than its factorization.

253421479 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1554896.

The product of its digits is 60480, while the sum is 37.

The square root of 253421479 is about 15919.2172860351. The cubic root of 253421479 is about 632.8213755264.

It can be divided in two parts, 2 and 53421479, that added together give a square (53421481 = 7309²).

The spelling of 253421479 in words is "two hundred fifty-three million, four hundred twenty-one thousand, four hundred seventy-nine".