279206399993 has 2 divisors, whose sum is σ = 279206399994. Its totient is φ = 279206399992.

The previous prime is 279206399987. The next prime is 279206400001. The reversal of 279206399993 is 399993602972.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 149298777664 + 129907622329 = 386392^2 + 360427^2 .

It is a cyclic number.

It is not a de Polignac number, because 279206399993 - 2¹⁶ = 279206334457 is a prime.

It is a super-2 number, since 2×279206399993² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (279206396993) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 139603199996 + 139603199997.

It is an arithmetic number, because the mean of its divisors is an integer number (139603199997).

Almost surely, 2^279206399993 is an apocalyptic number.

It is an amenable number.

279206399993 is a deficient number, since it is larger than the sum of its proper divisors (1).

279206399993 is an equidigital number, since it uses as much as digits as its factorization.

279206399993 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 89282088, while the sum is 68.

The spelling of 279206399993 in words is "two hundred seventy-nine billion, two hundred six million, three hundred ninety-nine thousand, nine hundred ninety-three".