69395981 has 2 divisors, whose sum is σ = 69395982. Its totient is φ = 69395980.

The previous prime is 69395971. The next prime is 69396007. The reversal of 69395981 is 18959396.

69395981 = 5890² + 5891².

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 34703881 + 34692100 = 5891^2 + 5890^2 .

It is a cyclic number.

It is not a de Polignac number, because 69395981 - 2²² = 65201677 is a prime.

It is a super-2 number, since 2×69395981² = 9631604357904722, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (69395971) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34697990 + 34697991.

It is an arithmetic number, because the mean of its divisors is an integer number (34697991).

Almost surely, 2^69395981 is an apocalyptic number.

69395981 is the 5891-st centered square number.

It is an amenable number.

69395981 is a deficient number, since it is larger than the sum of its proper divisors (1).

69395981 is an equidigital number, since it uses as much as digits as its factorization.

69395981 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 524880, while the sum is 50.

The square root of 69395981 is about 8330.4250191692. The cubic root of 69395981 is about 410.9397065648.

The spelling of 69395981 in words is "sixty-nine million, three hundred ninety-five thousand, nine hundred eighty-one".