279451061 has 2 divisors, whose sum is σ = 279451062. Its totient is φ = 279451060.

The previous prime is 279451057. The next prime is 279451063. The reversal of 279451061 is 160154972.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 267159025 + 12292036 = 16345^2 + 3506^2 .

It is a cyclic number.

It is not a de Polignac number, because 279451061 - 2² = 279451057 is a prime.

Together with 279451063, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (279451063) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 139725530 + 139725531.

It is an arithmetic number, because the mean of its divisors is an integer number (139725531).

Almost surely, 2^279451061 is an apocalyptic number.

279451061 is the 8936-th centered heptagonal number.

It is an amenable number.

279451061 is a deficient number, since it is larger than the sum of its proper divisors (1).

279451061 is an equidigital number, since it uses as much as digits as its factorization.

279451061 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15120, while the sum is 35.

The square root of 279451061 is about 16716.7897934980. The cubic root of 279451061 is about 653.7854547563.

The spelling of 279451061 in words is "two hundred seventy-nine million, four hundred fifty-one thousand, sixty-one".