279956542 has 4 divisors (see below), whose sum is σ = 419934816. Its totient is φ = 139978270.

The previous prime is 279956539. The next prime is 279956549. The reversal of 279956542 is 245659972.

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

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (279956549) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69989134 + ... + 69989137.

It is an arithmetic number, because the mean of its divisors is an integer number (104983704).

Almost surely, 2^279956542 is an apocalyptic number.

279956542 is a deficient number, since it is larger than the sum of its proper divisors (139978274).

279956542 is a wasteful number, since it uses less digits than its factorization.

279956542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 139978273.

The product of its digits is 1360800, while the sum is 49.

The square root of 279956542 is about 16731.9019241687. The cubic root of 279956542 is about 654.1794140961.

The spelling of 279956542 in words is "two hundred seventy-nine million, nine hundred fifty-six thousand, five hundred forty-two".