1253375979 has 4 divisors (see below), whose sum is σ = 1671167976. Its totient is φ = 835583984.

The previous prime is 1253375891. The next prime is 1253376023. The reversal of 1253375979 is 9795733521.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1253375979 - 2⁹ = 1253375467 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1253375579) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 208895994 + ... + 208895999.

It is an arithmetic number, because the mean of its divisors is an integer number (417791994).

Almost surely, 2^1253375979 is an apocalyptic number.

1253375979 is a deficient number, since it is larger than the sum of its proper divisors (417791997).

1253375979 is an equidigital number, since it uses as much as digits as its factorization.

1253375979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 417791996.

The product of its digits is 1786050, while the sum is 51.

The square root of 1253375979 is about 35403.0504194201. The cubic root of 1253375979 is about 1078.1862501073.

The spelling of 1253375979 in words is "one billion, two hundred fifty-three million, three hundred seventy-five thousand, nine hundred seventy-nine".