1387090387 has 8 divisors (see below), whose sum is σ = 1436583600. Its totient is φ = 1337708064.

The previous prime is 1387090361. The next prime is 1387090399. The reversal of 1387090387 is 7830907831.

It is a happy number.

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-1387090387 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1387090337) 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, 1837 + ... + 52702.

It is an arithmetic number, because the mean of its divisors is an integer number (179572950).

Almost surely, 2^1387090387 is an apocalyptic number.

1387090387 is a deficient number, since it is larger than the sum of its proper divisors (49493213).

1387090387 is an equidigital number, since it uses as much as digits as its factorization.

1387090387 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55445.

The product of its (nonzero) digits is 254016, while the sum is 46.

The square root of 1387090387 is about 37243.6623736173. The cubic root of 1387090387 is about 1115.2397848766.

The spelling of 1387090387 in words is "one billion, three hundred eighty-seven million, ninety thousand, three hundred eighty-seven".