1375887639 has 16 divisors (see below), whose sum is σ = 2219920128. Its totient is φ = 739972992.

The previous prime is 1375887637. The next prime is 1375887649. The reversal of 1375887639 is 9367885731.

It is not a de Polignac number, because 1375887639 - 2¹ = 1375887637 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1375887637) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1926657 + ... + 1927370.

It is an arithmetic number, because the mean of its divisors is an integer number (138745008).

Almost surely, 2^1375887639 is an apocalyptic number.

1375887639 is a deficient number, since it is larger than the sum of its proper divisors (844032489).

1375887639 is a wasteful number, since it uses less digits than its factorization.

1375887639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3854054.

The product of its digits is 7620480, while the sum is 57.

The square root of 1375887639 is about 37092.9594262847. The cubic root of 1375887639 is about 1112.2292776265.

The spelling of 1375887639 in words is "one billion, three hundred seventy-five million, eight hundred eighty-seven thousand, six hundred thirty-nine".