1389621495 has 16 divisors (see below), whose sum is σ = 2224609632. Its totient is φ = 740726400.

The previous prime is 1389621481. The next prime is 1389621511. The reversal of 1389621495 is 5941269831.

It is not a de Polignac number, because 1389621495 - 2⁷ = 1389621367 is a prime.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 4149 + ... + 52881.

It is an arithmetic number, because the mean of its divisors is an integer number (139038102).

Almost surely, 2^1389621495 is an apocalyptic number.

1389621495 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1389621495 is a deficient number, since it is larger than the sum of its proper divisors (834988137).

1389621495 is a wasteful number, since it uses less digits than its factorization.

1389621495 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50642.

The product of its digits is 466560, while the sum is 48.

The square root of 1389621495 is about 37277.6272715955. The cubic root of 1389621495 is about 1115.9177212564.

The spelling of 1389621495 in words is "one billion, three hundred eighty-nine million, six hundred twenty-one thousand, four hundred ninety-five".