1253916723 has 8 divisors (see below), whose sum is σ = 1759883200. Its totient is φ = 791947368.

The previous prime is 1253916721. The next prime is 1253916739. The reversal of 1253916723 is 3276193521.

It is a happy number.

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

It is not a de Polignac number, because 1253916723 - 2¹ = 1253916721 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1253916721) 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, 10999213 + ... + 10999326.

It is an arithmetic number, because the mean of its divisors is an integer number (219985400).

Almost surely, 2^1253916723 is an apocalyptic number.

1253916723 is a deficient number, since it is larger than the sum of its proper divisors (505966477).

1253916723 is a wasteful number, since it uses less digits than its factorization.

1253916723 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21998561.

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

The square root of 1253916723 is about 35410.6865649340. The cubic root of 1253916723 is about 1078.3412817793.

The spelling of 1253916723 in words is "one billion, two hundred fifty-three million, nine hundred sixteen thousand, seven hundred twenty-three".