18241397 has 2 divisors, whose sum is σ = 18241398. Its totient is φ = 18241396.

The previous prime is 18241367. The next prime is 18241427. The reversal of 18241397 is 79314281.

It is a balanced prime because it is at equal distance from previous prime (18241367) and next prime (18241427).

It can be written as a sum of positive squares in only one way, i.e., 16048036 + 2193361 = 4006^2 + 1481^2 .

It is a cyclic number.

It is not a de Polignac number, because 18241397 - 2¹⁴ = 18225013 is a prime.

It is a super-3 number, since 3×18241397³ (a number of 23 digits) contains 333 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18241367) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9120698 + 9120699.

It is an arithmetic number, because the mean of its divisors is an integer number (9120699).

Almost surely, 2^18241397 is an apocalyptic number.

It is an amenable number.

18241397 is a deficient number, since it is larger than the sum of its proper divisors (1).

18241397 is an equidigital number, since it uses as much as digits as its factorization.

18241397 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12096, while the sum is 35.

The square root of 18241397 is about 4270.9948489784. The cubic root of 18241397 is about 263.2404947887.

The spelling of 18241397 in words is "eighteen million, two hundred forty-one thousand, three hundred ninety-seven".