1316889187 has 2 divisors, whose sum is σ = 1316889188. Its totient is φ = 1316889186.

The previous prime is 1316889181. The next prime is 1316889229. The reversal of 1316889187 is 7819886131.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1316889187 - 2²⁷ = 1182671459 is a prime.

It is not a weakly prime, because it can be changed into another prime (1316889181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 658444593 + 658444594.

It is an arithmetic number, because the mean of its divisors is an integer number (658444594).

Almost surely, 2^1316889187 is an apocalyptic number.

1316889187 is a deficient number, since it is larger than the sum of its proper divisors (1).

1316889187 is an equidigital number, since it uses as much as digits as its factorization.

1316889187 is an evil number, because the sum of its binary digits is even.

The product of its digits is 580608, while the sum is 52.

The square root of 1316889187 is about 36288.9678414804. The cubic root of 1316889187 is about 1096.0989050082.

The spelling of 1316889187 in words is "one billion, three hundred sixteen million, eight hundred eighty-nine thousand, one hundred eighty-seven".