1939064871 has 8 divisors (see below), whose sum is σ = 2586109680. Its totient is φ = 1292364992.

The previous prime is 1939064861. The next prime is 1939064899. The reversal of 1939064871 is 1784609391.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1939064871 - 2²⁶ = 1871956007 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1939064871.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1939064821) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 72816 + ... + 95813.

It is an arithmetic number, because the mean of its divisors is an integer number (323263710).

Almost surely, 2^1939064871 is an apocalyptic number.

1939064871 is a deficient number, since it is larger than the sum of its proper divisors (647044809).

1939064871 is a wasteful number, since it uses less digits than its factorization.

1939064871 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 172465.

The product of its (nonzero) digits is 326592, while the sum is 48.

The square root of 1939064871 is about 44034.8143064099. The cubic root of 1939064871 is about 1246.9932793167.

The spelling of 1939064871 in words is "one billion, nine hundred thirty-nine million, sixty-four thousand, eight hundred seventy-one".