253686974 has 16 divisors (see below), whose sum is σ = 401689680. Its totient is φ = 120161016.

The previous prime is 253686973. The next prime is 253686989. The reversal of 253686974 is 479686352.

It is a happy number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (253686973) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4472 + ... + 22964.

It is an arithmetic number, because the mean of its divisors is an integer number (25105605).

Almost surely, 2^253686974 is an apocalyptic number.

253686974 is a deficient number, since it is larger than the sum of its proper divisors (148002706).

253686974 is an equidigital number, since it uses as much as digits as its factorization.

253686974 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18552 (or 18514 counting only the distinct ones).

The product of its digits is 2177280, while the sum is 50.

The square root of 253686974 is about 15927.5539239395. The cubic root of 253686974 is about 633.0422884947.

The spelling of 253686974 in words is "two hundred fifty-three million, six hundred eighty-six thousand, nine hundred seventy-four".