279090397 has 2 divisors, whose sum is σ = 279090398. Its totient is φ = 279090396.

The previous prime is 279090359. The next prime is 279090401. The reversal of 279090397 is 793090972.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 251095716 + 27994681 = 15846^2 + 5291^2 .

It is a cyclic number.

It is not a de Polignac number, because 279090397 - 2²⁷ = 144872669 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (279090307) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 139545198 + 139545199.

It is an arithmetic number, because the mean of its divisors is an integer number (139545199).

Almost surely, 2^279090397 is an apocalyptic number.

It is an amenable number.

279090397 is a deficient number, since it is larger than the sum of its proper divisors (1).

279090397 is an equidigital number, since it uses as much as digits as its factorization.

279090397 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 214326, while the sum is 46.

The square root of 279090397 is about 16705.9988327547. The cubic root of 279090397 is about 653.5040716878.

The spelling of 279090397 in words is "two hundred seventy-nine million, ninety thousand, three hundred ninety-seven".