279999983 has 2 divisors, whose sum is σ = 279999984. Its totient is φ = 279999982.

The previous prime is 279999949. The next prime is 279999989. The reversal of 279999983 is 389999972.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 279999983 - 2²² = 275805679 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (279999989) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 139999991 + 139999992.

It is an arithmetic number, because the mean of its divisors is an integer number (139999992).

Almost surely, 2^279999983 is an apocalyptic number.

279999983 is a deficient number, since it is larger than the sum of its proper divisors (1).

279999983 is an equidigital number, since it uses as much as digits as its factorization.

279999983 is an evil number, because the sum of its binary digits is even.

The product of its digits is 19840464, while the sum is 65.

The square root of 279999983 is about 16733.2000227093. The cubic root of 279999983 is about 654.2132487977.

It can be divided in two parts, 2799999 and 83, that added together give a palindrome (2800082).

The spelling of 279999983 in words is "two hundred seventy-nine million, nine hundred ninety-nine thousand, nine hundred eighty-three".