253400687 has 8 divisors (see below), whose sum is σ = 255760896. Its totient is φ = 251046432.

The previous prime is 253400659. The next prime is 253400699. The reversal of 253400687 is 786004352.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-253400687 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 (253400627) 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 7 ways as a sum of consecutive naturals, for example, 156293 + ... + 157905.

It is an arithmetic number, because the mean of its divisors is an integer number (31970112).

Almost surely, 2^253400687 is an apocalyptic number.

253400687 is a deficient number, since it is larger than the sum of its proper divisors (2360209).

253400687 is a wasteful number, since it uses less digits than its factorization.

253400687 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2977.

The product of its (nonzero) digits is 40320, while the sum is 35.

The square root of 253400687 is about 15918.5642254570. The cubic root of 253400687 is about 632.8040684142.

The spelling of 253400687 in words is "two hundred fifty-three million, four hundred thousand, six hundred eighty-seven".