1253810993 has 2 divisors, whose sum is σ = 1253810994. Its totient is φ = 1253810992.

The previous prime is 1253810959. The next prime is 1253811059. The reversal of 1253810993 is 3990183521.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 980503969 + 273307024 = 31313^2 + 16532^2 .

It is a cyclic number.

It is not a de Polignac number, because 1253810993 - 2²⁶ = 1186702129 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1253810993.

It is not a weakly prime, because it can be changed into another prime (1253840993) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 626905496 + 626905497.

It is an arithmetic number, because the mean of its divisors is an integer number (626905497).

Almost surely, 2^1253810993 is an apocalyptic number.

It is an amenable number.

1253810993 is a deficient number, since it is larger than the sum of its proper divisors (1).

1253810993 is an equidigital number, since it uses as much as digits as its factorization.

1253810993 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 58320, while the sum is 41.

The square root of 1253810993 is about 35409.1936225608. The cubic root of 1253810993 is about 1078.3109724224.

The spelling of 1253810993 in words is "one billion, two hundred fifty-three million, eight hundred ten thousand, nine hundred ninety-three".