253440723 has 8 divisors (see below), whose sum is σ = 338008000. Its totient is φ = 168916968.

The previous prime is 253440683. The next prime is 253440731. The reversal of 253440723 is 327044352.

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

It is not a de Polignac number, because 253440723 - 2⁹ = 253440211 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (253440763) 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, 6828 + ... + 23526.

It is an arithmetic number, because the mean of its divisors is an integer number (42251000).

Almost surely, 2^253440723 is an apocalyptic number.

253440723 is a deficient number, since it is larger than the sum of its proper divisors (84567277).

253440723 is a wasteful number, since it uses less digits than its factorization.

253440723 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21761.

The product of its (nonzero) digits is 20160, while the sum is 30.

The square root of 253440723 is about 15919.8217012629. The cubic root of 253440723 is about 632.8373932509.

The spelling of 253440723 in words is "two hundred fifty-three million, four hundred forty thousand, seven hundred twenty-three".