253003993 has 8 divisors (see below), whose sum is σ = 280124640. Its totient is φ = 226570080.

The previous prime is 253003957. The next prime is 253004021. The reversal of 253003993 is 399300352.

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

It is not a de Polignac number, because 253003993 - 2⁹ = 253003481 is a prime.

It is a super-2 number, since 2×253003993² = 128022040947888098, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (253003903) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 170908 + ... + 172381.

It is an arithmetic number, because the mean of its divisors is an integer number (35015580).

Almost surely, 2^253003993 is an apocalyptic number.

It is an amenable number.

253003993 is a deficient number, since it is larger than the sum of its proper divisors (27120647).

253003993 is a wasteful number, since it uses less digits than its factorization.

253003993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 343367.

The product of its (nonzero) digits is 21870, while the sum is 34.

The square root of 253003993 is about 15906.0992389712. The cubic root of 253003993 is about 632.4736816683.

The spelling of 253003993 in words is "two hundred fifty-three million, three thousand, nine hundred ninety-three".