1253988787 has 2 divisors, whose sum is σ = 1253988788. Its totient is φ = 1253988786.

The previous prime is 1253988763. The next prime is 1253988803. The reversal of 1253988787 is 7878893521.

It is a strong prime.

It is an emirp because it is prime and its reverse (7878893521) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1253988787 - 2²³ = 1245600179 is a prime.

It is not a weakly prime, because it can be changed into another prime (1253988707) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 626994393 + 626994394.

It is an arithmetic number, because the mean of its divisors is an integer number (626994394).

Almost surely, 2^1253988787 is an apocalyptic number.

1253988787 is a deficient number, since it is larger than the sum of its proper divisors (1).

1253988787 is an equidigital number, since it uses as much as digits as its factorization.

1253988787 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6773760, while the sum is 58.

The square root of 1253988787 is about 35411.7040962448. The cubic root of 1253988787 is about 1078.3619392111.

The spelling of 1253988787 in words is "one billion, two hundred fifty-three million, nine hundred eighty-eight thousand, seven hundred eighty-seven".