699389661941 has 2 divisors, whose sum is σ = 699389661942. Its totient is φ = 699389661940.

The previous prime is 699389661931. The next prime is 699389661959. The reversal of 699389661941 is 149166983996.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 696133247716 + 3256414225 = 834346^2 + 57065^2 .

It is a cyclic number.

It is not a de Polignac number, because 699389661941 - 2³⁴ = 682209792757 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (699389661931) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 349694830970 + 349694830971.

It is an arithmetic number, because the mean of its divisors is an integer number (349694830971).

Almost surely, 2^699389661941 is an apocalyptic number.

It is an amenable number.

699389661941 is a deficient number, since it is larger than the sum of its proper divisors (1).

699389661941 is an equidigital number, since it uses as much as digits as its factorization.

699389661941 is an evil number, because the sum of its binary digits is even.

The product of its digits is 136048896, while the sum is 71.

The spelling of 699389661941 in words is "six hundred ninety-nine billion, three hundred eighty-nine million, six hundred sixty-one thousand, nine hundred forty-one".