368637989 has 2 divisors, whose sum is σ = 368637990. Its totient is φ = 368637988.

The previous prime is 368637977. The next prime is 368637991. The reversal of 368637989 is 989736863.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 267976900 + 100661089 = 16370^2 + 10033^2 .

It is an emirp because it is prime and its reverse (989736863) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 368637989 - 2²⁸ = 100202533 is a prime.

Together with 368637991, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (368637289) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 184318994 + 184318995.

It is an arithmetic number, because the mean of its divisors is an integer number (184318995).

Almost surely, 2^368637989 is an apocalyptic number.

It is an amenable number.

368637989 is a deficient number, since it is larger than the sum of its proper divisors (1).

368637989 is an equidigital number, since it uses as much as digits as its factorization.

368637989 is an evil number, because the sum of its binary digits is even.

The product of its digits is 11757312, while the sum is 59.

The square root of 368637989 is about 19199.9476301369. The cubic root of 368637989 is about 717.0234556121.

The spelling of 368637989 in words is "three hundred sixty-eight million, six hundred thirty-seven thousand, nine hundred eighty-nine".