1995247079 has 16 divisors (see below), whose sum is σ = 2456186880. Its totient is φ = 1583081280.

The previous prime is 1995247061. The next prime is 1995247099. The reversal of 1995247079 is 9707425991.

It is a cyclic number.

It is not a de Polignac number, because 1995247079 - 2⁸ = 1995246823 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1995247079.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1995247049) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 194894 + ... + 204875.

It is an arithmetic number, because the mean of its divisors is an integer number (153511680).

Almost surely, 2^1995247079 is an apocalyptic number.

1995247079 is a deficient number, since it is larger than the sum of its proper divisors (460939801).

1995247079 is a wasteful number, since it uses less digits than its factorization.

1995247079 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 399830.

The product of its (nonzero) digits is 1428840, while the sum is 53.

The square root of 1995247079 is about 44668.1886693427. The cubic root of 1995247079 is about 1258.9222073705.

The spelling of 1995247079 in words is "one billion, nine hundred ninety-five million, two hundred forty-seven thousand, seventy-nine".