1387487149 has 4 divisors (see below), whose sum is σ = 1419754336. Its totient is φ = 1355219964.

The previous prime is 1387487131. The next prime is 1387487201. The reversal of 1387487149 is 9417847831.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1387487149 - 2⁵ = 1387487117 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1387487096 and 1387487105.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1387487449) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16133529 + ... + 16133614.

It is an arithmetic number, because the mean of its divisors is an integer number (354938584).

Almost surely, 2^1387487149 is an apocalyptic number.

It is an amenable number.

1387487149 is a deficient number, since it is larger than the sum of its proper divisors (32267187).

1387487149 is an equidigital number, since it uses as much as digits as its factorization.

1387487149 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32267186.

The product of its digits is 1354752, while the sum is 52.

The square root of 1387487149 is about 37248.9885634496. The cubic root of 1387487149 is about 1115.3461087780.

The spelling of 1387487149 in words is "one billion, three hundred eighty-seven million, four hundred eighty-seven thousand, one hundred forty-nine".