79782143 has 16 divisors (see below), whose sum is σ = 93676800. Its totient is φ = 67917528.

The previous prime is 79782137. The next prime is 79782151. The reversal of 79782143 is 34128797.

It is not a de Polignac number, because 79782143 - 2⁸ = 79781887 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 79782143.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79782113) 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, 55196 + ... + 56622.

It is an arithmetic number, because the mean of its divisors is an integer number (5854800).

Almost surely, 2^79782143 is an apocalyptic number.

79782143 is a deficient number, since it is larger than the sum of its proper divisors (13894657).

79782143 is a wasteful number, since it uses less digits than its factorization.

79782143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1611 (or 1597 counting only the distinct ones).

The product of its digits is 84672, while the sum is 41.

The square root of 79782143 is about 8932.0850309432. The cubic root of 79782143 is about 430.4954501910.

The spelling of 79782143 in words is "seventy-nine million, seven hundred eighty-two thousand, one hundred forty-three".