253434403387 has 4 divisors (see below), whose sum is σ = 276473894616. Its totient is φ = 230394912160.

The previous prime is 253434403153. The next prime is 253434403393. The reversal of 253434403387 is 783304434352.

It is a happy number.

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 253434403387 - 2¹⁵ = 253434370619 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (253434403787) 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, 11519745598 + ... + 11519745619.

It is an arithmetic number, because the mean of its divisors is an integer number (69118473654).

Almost surely, 2^253434403387 is an apocalyptic number.

253434403387 is a deficient number, since it is larger than the sum of its proper divisors (23039491229).

253434403387 is a wasteful number, since it uses less digits than its factorization.

253434403387 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23039491228.

The product of its (nonzero) digits is 2903040, while the sum is 46.

The spelling of 253434403387 in words is "two hundred fifty-three billion, four hundred thirty-four million, four hundred three thousand, three hundred eighty-seven".