279144142 has 4 divisors (see below), whose sum is σ = 418716216. Its totient is φ = 139572070.

The previous prime is 279144133. The next prime is 279144157. The reversal of 279144142 is 241441972.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a junction number, because it is equal to n+sod(n) for n = 279144098 and 279144107.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69786034 + ... + 69786037.

It is an arithmetic number, because the mean of its divisors is an integer number (104679054).

Almost surely, 2^279144142 is an apocalyptic number.

279144142 is a deficient number, since it is larger than the sum of its proper divisors (139572074).

279144142 is a wasteful number, since it uses less digits than its factorization.

279144142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 139572073.

The product of its digits is 16128, while the sum is 34.

The square root of 279144142 is about 16707.6073092469. The cubic root of 279144142 is about 653.5460178606.

The spelling of 279144142 in words is "two hundred seventy-nine million, one hundred forty-four thousand, one hundred forty-two".