1995117929 has 4 divisors (see below), whose sum is σ = 2280134784. Its totient is φ = 1710101076.

The previous prime is 1995117853. The next prime is 1995117937. The reversal of 1995117929 is 9297115991.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1995117929 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1995117979) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 142508417 + ... + 142508430.

It is an arithmetic number, because the mean of its divisors is an integer number (570033696).

Almost surely, 2^1995117929 is an apocalyptic number.

It is an amenable number.

1995117929 is a deficient number, since it is larger than the sum of its proper divisors (285016855).

1995117929 is an equidigital number, since it uses as much as digits as its factorization.

1995117929 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 285016854.

The product of its digits is 459270, while the sum is 53.

The square root of 1995117929 is about 44666.7429862532. The cubic root of 1995117929 is about 1258.8950439325.

The spelling of 1995117929 in words is "one billion, nine hundred ninety-five million, one hundred seventeen thousand, nine hundred twenty-nine".