799878137 has 2 divisors, whose sum is σ = 799878138. Its totient is φ = 799878136.

The previous prime is 799878127. The next prime is 799878241. The reversal of 799878137 is 731878997.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 630461881 + 169416256 = 25109^2 + 13016^2 .

It is a cyclic number.

It is not a de Polignac number, because 799878137 - 2¹² = 799874041 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (799878127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 399939068 + 399939069.

It is an arithmetic number, because the mean of its divisors is an integer number (399939069).

Almost surely, 2^799878137 is an apocalyptic number.

It is an amenable number.

799878137 is a deficient number, since it is larger than the sum of its proper divisors (1).

799878137 is an equidigital number, since it uses as much as digits as its factorization.

799878137 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5334336, while the sum is 59.

The square root of 799878137 is about 28282.1169115751. The cubic root of 799878137 is about 928.2706278339.

The spelling of 799878137 in words is "seven hundred ninety-nine million, eight hundred seventy-eight thousand, one hundred thirty-seven".