698838161977 has 2 divisors, whose sum is σ = 698838161978. Its totient is φ = 698838161976.

The previous prime is 698838161939. The next prime is 698838162013. The reversal of 698838161977 is 779161838896.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 419727762496 + 279110399481 = 647864^2 + 528309^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-698838161977 is a prime.

It is not a weakly prime, because it can be changed into another prime (698838162977) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 349419080988 + 349419080989.

It is an arithmetic number, because the mean of its divisors is an integer number (349419080989).

Almost surely, 2^698838161977 is an apocalyptic number.

It is an amenable number.

698838161977 is a deficient number, since it is larger than the sum of its proper divisors (1).

698838161977 is an equidigital number, since it uses as much as digits as its factorization.

698838161977 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 219469824, while the sum is 73.

The spelling of 698838161977 in words is "six hundred ninety-eight billion, eight hundred thirty-eight million, one hundred sixty-one thousand, nine hundred seventy-seven".