855129939 has 8 divisors (see below), whose sum is σ = 1140315072. Its totient is φ = 570015720.

The previous prime is 855129901. The next prime is 855129953. The reversal of 855129939 is 939921558.

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

It is not a de Polignac number, because 855129939 - 2¹¹ = 855127891 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 855129891 and 855129900.

It is not an unprimeable number, because it can be changed into a prime (855129239) 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, 25404 + ... + 48534.

It is an arithmetic number, because the mean of its divisors is an integer number (142539384).

Almost surely, 2^855129939 is an apocalyptic number.

855129939 is a deficient number, since it is larger than the sum of its proper divisors (285185133).

855129939 is a wasteful number, since it uses less digits than its factorization.

855129939 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35457.

The product of its digits is 874800, while the sum is 51.

The square root of 855129939 is about 29242.6048600326. The cubic root of 855129939 is about 949.1700744446.

The spelling of 855129939 in words is "eight hundred fifty-five million, one hundred twenty-nine thousand, nine hundred thirty-nine".