368909881 has 2 divisors, whose sum is σ = 368909882. Its totient is φ = 368909880.

The previous prime is 368909819. The next prime is 368909897. The reversal of 368909881 is 188909863.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 363245481 + 5664400 = 19059^2 + 2380^2 .

It is a cyclic number.

It is not a de Polignac number, because 368909881 - 2¹⁹ = 368385593 is a prime.

It is a super-2 number, since 2×368909881² = 272189000598868322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (368900881) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 184454940 + 184454941.

It is an arithmetic number, because the mean of its divisors is an integer number (184454941).

Almost surely, 2^368909881 is an apocalyptic number.

It is an amenable number.

368909881 is a deficient number, since it is larger than the sum of its proper divisors (1).

368909881 is an equidigital number, since it uses as much as digits as its factorization.

368909881 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 746496, while the sum is 52.

The square root of 368909881 is about 19207.0268651866. The cubic root of 368909881 is about 717.1996944853.

The spelling of 368909881 in words is "three hundred sixty-eight million, nine hundred nine thousand, eight hundred eighty-one".