1387690325 has 24 divisors (see below), whose sum is σ = 1999901760. Its totient is φ = 935424000.

The previous prime is 1387690319. The next prime is 1387690351. The reversal of 1387690325 is 5230967831.

It is a de Polignac number, because none of the positive numbers 2^k-1387690325 is a prime.

It is a Smith number, since the sum of its digits (44) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 56876 + ... + 77525.

It is an arithmetic number, because the mean of its divisors is an integer number (83329240).

Almost surely, 2^1387690325 is an apocalyptic number.

It is an amenable number.

1387690325 is a deficient number, since it is larger than the sum of its proper divisors (612211435).

1387690325 is a wasteful number, since it uses less digits than its factorization.

1387690325 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 134477 (or 134472 counting only the distinct ones).

The product of its (nonzero) digits is 272160, while the sum is 44.

The square root of 1387690325 is about 37251.7157322988. The cubic root of 1387690325 is about 1115.4005478410.

The spelling of 1387690325 in words is "one billion, three hundred eighty-seven million, six hundred ninety thousand, three hundred twenty-five".