253340687 has 4 divisors (see below), whose sum is σ = 254058720. Its totient is φ = 252622656.

The previous prime is 253340671. The next prime is 253340693. The reversal of 253340687 is 786043352.

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 253340687 - 2⁴ = 253340671 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 253340687.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (253340627) 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, 358487 + ... + 359192.

It is an arithmetic number, because the mean of its divisors is an integer number (63514680).

Almost surely, 2^253340687 is an apocalyptic number.

253340687 is a deficient number, since it is larger than the sum of its proper divisors (718033).

253340687 is an equidigital number, since it uses as much as digits as its factorization.

253340687 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 718032.

The product of its (nonzero) digits is 120960, while the sum is 38.

The square root of 253340687 is about 15916.6795218098. The cubic root of 253340687 is about 632.7541195346.

The spelling of 253340687 in words is "two hundred fifty-three million, three hundred forty thousand, six hundred eighty-seven".