253423403 has 4 divisors (see below), whose sum is σ = 268330680. Its totient is φ = 238516128.

The previous prime is 253423327. The next prime is 253423421. The reversal of 253423403 is 304324352.

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 253423403 - 2¹² = 253419307 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (253423433) 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, 7453613 + ... + 7453646.

It is an arithmetic number, because the mean of its divisors is an integer number (67082670).

Almost surely, 2^253423403 is an apocalyptic number.

253423403 is a deficient number, since it is larger than the sum of its proper divisors (14907277).

253423403 is a wasteful number, since it uses less digits than its factorization.

253423403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14907276.

The product of its (nonzero) digits is 8640, while the sum is 26.

The square root of 253423403 is about 15919.2777160272. The cubic root of 253423403 is about 632.8229770024.

Adding to 253423403 its reverse (304324352), we get a palindrome (557747755).

The spelling of 253423403 in words is "two hundred fifty-three million, four hundred twenty-three thousand, four hundred three".