1376009987 has 8 divisors (see below), whose sum is σ = 1503109632. Its totient is φ = 1249245000.

The previous prime is 1376009981. The next prime is 1376010007. The reversal of 1376009987 is 7899006731.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1376009987 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1376009981) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 75023 + ... + 91544.

It is an arithmetic number, because the mean of its divisors is an integer number (187888704).

Almost surely, 2^1376009987 is an apocalyptic number.

1376009987 is a deficient number, since it is larger than the sum of its proper divisors (127099645).

1376009987 is a wasteful number, since it uses less digits than its factorization.

1376009987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 167329.

The product of its (nonzero) digits is 571536, while the sum is 50.

The square root of 1376009987 is about 37094.6085974768. The cubic root of 1376009987 is about 1112.2622442222.

The spelling of 1376009987 in words is "one billion, three hundred seventy-six million, nine thousand, nine hundred eighty-seven".