279898427 has 2 divisors, whose sum is σ = 279898428. Its totient is φ = 279898426.

The previous prime is 279898417. The next prime is 279898429. The reversal of 279898427 is 724898972.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-279898427 is a prime.

Together with 279898429, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (279898429) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 139949213 + 139949214.

It is an arithmetic number, because the mean of its divisors is an integer number (139949214).

Almost surely, 2^279898427 is an apocalyptic number.

279898427 is a deficient number, since it is larger than the sum of its proper divisors (1).

279898427 is an equidigital number, since it uses as much as digits as its factorization.

279898427 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4064256, while the sum is 56.

The square root of 279898427 is about 16730.1651814918. The cubic root of 279898427 is about 654.1341448467.

The spelling of 279898427 in words is "two hundred seventy-nine million, eight hundred ninety-eight thousand, four hundred twenty-seven".