1313989487 has 2 divisors, whose sum is σ = 1313989488. Its totient is φ = 1313989486.

The previous prime is 1313989477. The next prime is 1313989489. The reversal of 1313989487 is 7849893131.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1313989487 - 2⁶ = 1313989423 is a prime.

Together with 1313989489, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1313989489) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 656994743 + 656994744.

It is an arithmetic number, because the mean of its divisors is an integer number (656994744).

Almost surely, 2^1313989487 is an apocalyptic number.

1313989487 is a deficient number, since it is larger than the sum of its proper divisors (1).

1313989487 is an equidigital number, since it uses as much as digits as its factorization.

1313989487 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1306368, while the sum is 53.

The square root of 1313989487 is about 36248.9929101486. The cubic root of 1313989487 is about 1095.2938021627.

The spelling of 1313989487 in words is "one billion, three hundred thirteen million, nine hundred eighty-nine thousand, four hundred eighty-seven".