1939271257 has 16 divisors (see below), whose sum is σ = 2422886400. Its totient is φ = 1507937040.

The previous prime is 1939271231. The next prime is 1939271263. The reversal of 1939271257 is 7521729391.

It is a cyclic number.

It is not a de Polignac number, because 1939271257 - 2²³ = 1930882649 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1939271297) 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 15 ways as a sum of consecutive naturals, for example, 10594 + ... + 63172.

It is an arithmetic number, because the mean of its divisors is an integer number (151430400).

Almost surely, 2^1939271257 is an apocalyptic number.

It is an amenable number.

1939271257 is a deficient number, since it is larger than the sum of its proper divisors (483615143).

1939271257 is a wasteful number, since it uses less digits than its factorization.

1939271257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53076.

The product of its digits is 238140, while the sum is 46.

The square root of 1939271257 is about 44037.1576853003. The cubic root of 1939271257 is about 1247.0375193399.

The spelling of 1939271257 in words is "one billion, nine hundred thirty-nine million, two hundred seventy-one thousand, two hundred fifty-seven".