253993909 has 8 divisors (see below), whose sum is σ = 277385472. Its totient is φ = 231152880.

The previous prime is 253993897. The next prime is 253993913. The reversal of 253993909 is 909399352.

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

It is a cyclic number.

It is not a de Polignac number, because 253993909 - 2¹³ = 253985717 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (253993979) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 136669 + ... + 138514.

It is an arithmetic number, because the mean of its divisors is an integer number (34673184).

Almost surely, 2^253993909 is an apocalyptic number.

It is an amenable number.

253993909 is a deficient number, since it is larger than the sum of its proper divisors (23391563).

253993909 is a wasteful number, since it uses less digits than its factorization.

253993909 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 275267.

The product of its (nonzero) digits is 590490, while the sum is 49.

The square root of 253993909 is about 15937.1863576981. The cubic root of 253993909 is about 633.2974908309.

The spelling of 253993909 in words is "two hundred fifty-three million, nine hundred ninety-three thousand, nine hundred nine".