18980597 has 2 divisors, whose sum is σ = 18980598. Its totient is φ = 18980596.

The previous prime is 18980579. The next prime is 18980603. The reversal of 18980597 is 79508981.

It is a happy number.

Together with previous prime (18980579) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13845841 + 5134756 = 3721^2 + 2266^2 .

It is a cyclic number.

It is not a de Polignac number, because 18980597 - 2⁸ = 18980341 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 (18980537) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9490298 + 9490299.

It is an arithmetic number, because the mean of its divisors is an integer number (9490299).

Almost surely, 2^18980597 is an apocalyptic number.

It is an amenable number.

18980597 is a deficient number, since it is larger than the sum of its proper divisors (1).

18980597 is an equidigital number, since it uses as much as digits as its factorization.

18980597 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 181440, while the sum is 47.

The square root of 18980597 is about 4356.6726982871. The cubic root of 18980597 is about 266.7493006063.

The spelling of 18980597 in words is "eighteen million, nine hundred eighty thousand, five hundred ninety-seven".