278982131 has 4 divisors (see below), whose sum is σ = 279759600. Its totient is φ = 278204664.

The previous prime is 278982127. The next prime is 278982167. The reversal of 278982131 is 131289872.

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

It is a cyclic number.

It is not a de Polignac number, because 278982131 - 2² = 278982127 is a prime.

It is a super-2 number, since 2×278982131² = 155662058834602322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (278982931) 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, 388196 + ... + 388913.

It is an arithmetic number, because the mean of its divisors is an integer number (69939900).

Almost surely, 2^278982131 is an apocalyptic number.

278982131 is a deficient number, since it is larger than the sum of its proper divisors (777469).

278982131 is an equidigital number, since it uses as much as digits as its factorization.

278982131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 777468.

The product of its digits is 48384, while the sum is 41.

The square root of 278982131 is about 16702.7581854016. The cubic root of 278982131 is about 653.4195573472.

The spelling of 278982131 in words is "two hundred seventy-eight million, nine hundred eighty-two thousand, one hundred thirty-one".