279325421 has 2 divisors, whose sum is σ = 279325422. Its totient is φ = 279325420.

The previous prime is 279325399. The next prime is 279325427. The reversal of 279325421 is 124523972.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 198415396 + 80910025 = 14086^2 + 8995^2 .

It is a cyclic number.

It is not a de Polignac number, because 279325421 - 2⁶ = 279325357 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (279325427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 139662710 + 139662711.

It is an arithmetic number, because the mean of its divisors is an integer number (139662711).

Almost surely, 2^279325421 is an apocalyptic number.

It is an amenable number.

279325421 is a deficient number, since it is larger than the sum of its proper divisors (1).

279325421 is an equidigital number, since it uses as much as digits as its factorization.

279325421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 30240, while the sum is 35.

The square root of 279325421 is about 16713.0314724768. The cubic root of 279325421 is about 653.6874603556.

The spelling of 279325421 in words is "two hundred seventy-nine million, three hundred twenty-five thousand, four hundred twenty-one".