367199981 has 2 divisors, whose sum is σ = 367199982. Its totient is φ = 367199980.

The previous prime is 367199969. The next prime is 367200007. The reversal of 367199981 is 189991763.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 366722500 + 477481 = 19150^2 + 691^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-367199981 is a prime.

It is a super-2 number, since 2×367199981² = 269671652092800722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (367192981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 183599990 + 183599991.

It is an arithmetic number, because the mean of its divisors is an integer number (183599991).

Almost surely, 2^367199981 is an apocalyptic number.

It is an amenable number.

367199981 is a deficient number, since it is larger than the sum of its proper divisors (1).

367199981 is an equidigital number, since it uses as much as digits as its factorization.

367199981 is an evil number, because the sum of its binary digits is even.

The product of its digits is 734832, while the sum is 53.

The square root of 367199981 is about 19162.4628114447. The cubic root of 367199981 is about 716.0899028055.

The spelling of 367199981 in words is "three hundred sixty-seven million, one hundred ninety-nine thousand, nine hundred eighty-one".