1375015987 has 2 divisors, whose sum is σ = 1375015988. Its totient is φ = 1375015986.

The previous prime is 1375015933. The next prime is 1375016017. The reversal of 1375015987 is 7895105731.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1375015987 is a prime.

It is not a weakly prime, because it can be changed into another prime (1375015927) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 687507993 + 687507994.

It is an arithmetic number, because the mean of its divisors is an integer number (687507994).

Almost surely, 2^1375015987 is an apocalyptic number.

1375015987 is a deficient number, since it is larger than the sum of its proper divisors (1).

1375015987 is an equidigital number, since it uses as much as digits as its factorization.

1375015987 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 264600, while the sum is 46.

The square root of 1375015987 is about 37081.2080035157. The cubic root of 1375015987 is about 1111.9943549370.

The spelling of 1375015987 in words is "one billion, three hundred seventy-five million, fifteen thousand, nine hundred eighty-seven".