367199999981 has 2 divisors, whose sum is σ = 367199999982. Its totient is φ = 367199999980.

The previous prime is 367199999941. The next prime is 367200000023. The reversal of 367199999981 is 189999991763.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 359839217956 + 7360782025 = 599866^2 + 85795^2 .

It is a cyclic number.

It is not a de Polignac number, because 367199999981 - 2⁶ = 367199999917 is a prime.

It is a super-2 number, since 2×367199999981² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 367199999896 and 367199999905.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (367199999941) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 183599999990 + 183599999991.

It is an arithmetic number, because the mean of its divisors is an integer number (183599999991).

Almost surely, 2^367199999981 is an apocalyptic number.

It is an amenable number.

367199999981 is a deficient number, since it is larger than the sum of its proper divisors (1).

367199999981 is an equidigital number, since it uses as much as digits as its factorization.

367199999981 is an evil number, because the sum of its binary digits is even.

The product of its digits is 535692528, while the sum is 80.

The spelling of 367199999981 in words is "three hundred sixty-seven billion, one hundred ninety-nine million, nine hundred ninety-nine thousand, nine hundred eighty-one".