253940709 has 8 divisors (see below), whose sum is σ = 369368352. Its totient is φ = 153903440.

The previous prime is 253940707. The next prime is 253940737. The reversal of 253940709 is 907049352.

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 253940709 - 2¹ = 253940707 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (253940707) 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, 3847554 + ... + 3847619.

It is an arithmetic number, because the mean of its divisors is an integer number (46171044).

Almost surely, 2^253940709 is an apocalyptic number.

It is an amenable number.

253940709 is a deficient number, since it is larger than the sum of its proper divisors (115427643).

253940709 is a wasteful number, since it uses less digits than its factorization.

253940709 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7695187.

The product of its (nonzero) digits is 68040, while the sum is 39.

The square root of 253940709 is about 15935.5172178376. The cubic root of 253940709 is about 633.2532722127.

The spelling of 253940709 in words is "two hundred fifty-three million, nine hundred forty thousand, seven hundred nine".