18952397 has 2 divisors, whose sum is σ = 18952398. Its totient is φ = 18952396.

The previous prime is 18952321. The next prime is 18952403. The reversal of 18952397 is 79325981.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14546596 + 4405801 = 3814^2 + 2099^2 .

It is a cyclic number.

It is not a de Polignac number, because 18952397 - 2¹⁴ = 18936013 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18952097) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9476198 + 9476199.

It is an arithmetic number, because the mean of its divisors is an integer number (9476199).

Almost surely, 2^18952397 is an apocalyptic number.

It is an amenable number.

18952397 is a deficient number, since it is larger than the sum of its proper divisors (1).

18952397 is an equidigital number, since it uses as much as digits as its factorization.

18952397 is an evil number, because the sum of its binary digits is even.

The product of its digits is 136080, while the sum is 44.

The square root of 18952397 is about 4353.4350804853. The cubic root of 18952397 is about 266.6171295136.

The spelling of 18952397 in words is "eighteen million, nine hundred fifty-two thousand, three hundred ninety-seven".