1939861473 has 24 divisors (see below), whose sum is σ = 2850813504. Its totient is φ = 1172439840.

The previous prime is 1939861471. The next prime is 1939861481. The reversal of 1939861473 is 3741689391.

It is not a de Polignac number, because 1939861473 - 2¹ = 1939861471 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1939861471) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 128236 + ... + 142562.

It is an arithmetic number, because the mean of its divisors is an integer number (118783896).

Almost surely, 2^1939861473 is an apocalyptic number.

It is an amenable number.

1939861473 is a deficient number, since it is larger than the sum of its proper divisors (910952031).

1939861473 is a wasteful number, since it uses less digits than its factorization.

1939861473 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14725 (or 14714 counting only the distinct ones).

The product of its digits is 979776, while the sum is 51.

The square root of 1939861473 is about 44043.8585162563. The cubic root of 1939861473 is about 1247.1640182051.

The spelling of 1939861473 in words is "one billion, nine hundred thirty-nine million, eight hundred sixty-one thousand, four hundred seventy-three".