1298165677 has 2 divisors, whose sum is σ = 1298165678. Its totient is φ = 1298165676.

The previous prime is 1298165663. The next prime is 1298165681. The reversal of 1298165677 is 7765618921.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1219825476 + 78340201 = 34926^2 + 8851^2 .

It is a cyclic number.

It is not a de Polignac number, because 1298165677 - 2⁷ = 1298165549 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1298195677) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 649082838 + 649082839.

It is an arithmetic number, because the mean of its divisors is an integer number (649082839).

Almost surely, 2^1298165677 is an apocalyptic number.

It is an amenable number.

1298165677 is a deficient number, since it is larger than the sum of its proper divisors (1).

1298165677 is an equidigital number, since it uses as much as digits as its factorization.

1298165677 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1270080, while the sum is 52.

The square root of 1298165677 is about 36030.0662919179. The cubic root of 1298165677 is about 1090.8793165457.

The spelling of 1298165677 in words is "one billion, two hundred ninety-eight million, one hundred sixty-five thousand, six hundred seventy-seven".