18376997 has 2 divisors, whose sum is σ = 18376998. Its totient is φ = 18376996.

The previous prime is 18376991. The next prime is 18377003. The reversal of 18376997 is 79967381.

It is a balanced prime because it is at equal distance from previous prime (18376991) and next prime (18377003).

It can be written as a sum of positive squares in only one way, i.e., 17926756 + 450241 = 4234^2 + 671^2 .

It is a cyclic number.

It is not a de Polignac number, because 18376997 - 2¹⁸ = 18114853 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18376991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9188498 + 9188499.

It is an arithmetic number, because the mean of its divisors is an integer number (9188499).

Almost surely, 2^18376997 is an apocalyptic number.

It is an amenable number.

18376997 is a deficient number, since it is larger than the sum of its proper divisors (1).

18376997 is an equidigital number, since it uses as much as digits as its factorization.

18376997 is an evil number, because the sum of its binary digits is even.

The product of its digits is 571536, while the sum is 50.

The square root of 18376997 is about 4286.8399783524. The cubic root of 18376997 is about 263.8911636238.

The spelling of 18376997 in words is "eighteen million, three hundred seventy-six thousand, nine hundred ninety-seven".