1253131687 has 2 divisors, whose sum is σ = 1253131688. Its totient is φ = 1253131686.

The previous prime is 1253131679. The next prime is 1253131697. The reversal of 1253131687 is 7861313521.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1253131687 - 2³ = 1253131679 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1253131637) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 626565843 + 626565844.

It is an arithmetic number, because the mean of its divisors is an integer number (626565844).

Almost surely, 2^1253131687 is an apocalyptic number.

1253131687 is a deficient number, since it is larger than the sum of its proper divisors (1).

1253131687 is an equidigital number, since it uses as much as digits as its factorization.

1253131687 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 30240, while the sum is 37.

The square root of 1253131687 is about 35399.6000966113. The cubic root of 1253131687 is about 1078.1161968022.

The spelling of 1253131687 in words is "one billion, two hundred fifty-three million, one hundred thirty-one thousand, six hundred eighty-seven".