1798797137 has 2 divisors, whose sum is σ = 1798797138. Its totient is φ = 1798797136.

The previous prime is 1798797131. The next prime is 1798797191. The reversal of 1798797137 is 7317978971.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 962488576 + 836308561 = 31024^2 + 28919^2 .

It is a cyclic number.

It is not a de Polignac number, because 1798797137 - 2¹⁶ = 1798731601 is a prime.

It is a super-2 number, since 2×1798797137² = 6471342280158793538, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1798797131) 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, 899398568 + 899398569.

It is an arithmetic number, because the mean of its divisors is an integer number (899398569).

Almost surely, 2^1798797137 is an apocalyptic number.

It is an amenable number.

1798797137 is a deficient number, since it is larger than the sum of its proper divisors (1).

1798797137 is an equidigital number, since it uses as much as digits as its factorization.

1798797137 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4667544, while the sum is 59.

The square root of 1798797137 is about 42412.2286257160. The cubic root of 1798797137 is about 1216.1693737068.

The spelling of 1798797137 in words is "one billion, seven hundred ninety-eight million, seven hundred ninety-seven thousand, one hundred thirty-seven".