799521137 has 2 divisors, whose sum is σ = 799521138. Its totient is φ = 799521136.

The previous prime is 799521127. The next prime is 799521167. The reversal of 799521137 is 731125997.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 572597041 + 226924096 = 23929^2 + 15064^2 .

It is a cyclic number.

It is not a de Polignac number, because 799521137 - 2¹² = 799517041 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (799521127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 399760568 + 399760569.

It is an arithmetic number, because the mean of its divisors is an integer number (399760569).

Almost surely, 2^799521137 is an apocalyptic number.

It is an amenable number.

799521137 is a deficient number, since it is larger than the sum of its proper divisors (1).

799521137 is an equidigital number, since it uses as much as digits as its factorization.

799521137 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 119070, while the sum is 44.

The square root of 799521137 is about 28275.8047984492. The cubic root of 799521137 is about 928.1325059905.

The spelling of 799521137 in words is "seven hundred ninety-nine million, five hundred twenty-one thousand, one hundred thirty-seven".