368639969 has 2 divisors, whose sum is σ = 368639970. Its totient is φ = 368639968.

The previous prime is 368639959. The next prime is 368639981. The reversal of 368639969 is 969936863.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 364313569 + 4326400 = 19087^2 + 2080^2 .

It is a cyclic number.

It is not a de Polignac number, because 368639969 - 2¹² = 368635873 is a prime.

It is a super-2 number, since 2×368639969² = 271790853488641922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (368639959) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 184319984 + 184319985.

It is an arithmetic number, because the mean of its divisors is an integer number (184319985).

Almost surely, 2^368639969 is an apocalyptic number.

It is an amenable number.

368639969 is a deficient number, since it is larger than the sum of its proper divisors (1).

368639969 is an equidigital number, since it uses as much as digits as its factorization.

368639969 is an evil number, because the sum of its binary digits is even.

The product of its digits is 11337408, while the sum is 59.

The square root of 368639969 is about 19199.9991927083. Note that the first 3 decimals coincide. The cubic root of 368639969 is about 717.0247393503.

The spelling of 368639969 in words is "three hundred sixty-eight million, six hundred thirty-nine thousand, nine hundred sixty-nine".