1253156689 has 2 divisors, whose sum is σ = 1253156690. Its totient is φ = 1253156688.

The previous prime is 1253156651. The next prime is 1253156731. The reversal of 1253156689 is 9866513521.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 629006400 + 624150289 = 25080^2 + 24983^2 .

It is an emirp because it is prime and its reverse (9866513521) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1253156689 - 2⁷ = 1253156561 is a prime.

It is not a weakly prime, because it can be changed into another prime (1253156089) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 626578344 + 626578345.

It is an arithmetic number, because the mean of its divisors is an integer number (626578345).

Almost surely, 2^1253156689 is an apocalyptic number.

It is an amenable number.

1253156689 is a deficient number, since it is larger than the sum of its proper divisors (1).

1253156689 is an equidigital number, since it uses as much as digits as its factorization.

1253156689 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 388800, while the sum is 46.

The square root of 1253156689 is about 35399.9532344324. The cubic root of 1253156689 is about 1078.1233668073.

The spelling of 1253156689 in words is "one billion, two hundred fifty-three million, one hundred fifty-six thousand, six hundred eighty-nine".