1537889139 has 32 divisors (see below), whose sum is σ = 2426941440. Its totient is φ = 959124096.

The previous prime is 1537889107. The next prime is 1537889147. The reversal of 1537889139 is 9319887351.

It is not a de Polignac number, because 1537889139 - 2⁵ = 1537889107 is a prime.

It is a super-2 number, since 2×1537889139² = 4730206007708322642, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1537889149) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 66622 + ... + 86684.

It is an arithmetic number, because the mean of its divisors is an integer number (75841920).

Almost surely, 2^1537889139 is an apocalyptic number.

1537889139 is a deficient number, since it is larger than the sum of its proper divisors (889052301).

1537889139 is a wasteful number, since it uses less digits than its factorization.

1537889139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20256 (or 20250 counting only the distinct ones).

The product of its digits is 1632960, while the sum is 54.

The square root of 1537889139 is about 39215.9296587496. The cubic root of 1537889139 is about 1154.2724850075.

The spelling of 1537889139 in words is "one billion, five hundred thirty-seven million, eight hundred eighty-nine thousand, one hundred thirty-nine".