18629497 has 2 divisors, whose sum is σ = 18629498. Its totient is φ = 18629496.

The previous prime is 18629491. The next prime is 18629521. The reversal of 18629497 is 79492681.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17131321 + 1498176 = 4139^2 + 1224^2 .

It is a cyclic number.

It is not a de Polignac number, because 18629497 - 2³ = 18629489 is a prime.

It is not a weakly prime, because it can be changed into another prime (18629491) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9314748 + 9314749.

It is an arithmetic number, because the mean of its divisors is an integer number (9314749).

Almost surely, 2^18629497 is an apocalyptic number.

It is an amenable number.

18629497 is a deficient number, since it is larger than the sum of its proper divisors (1).

18629497 is an equidigital number, since it uses as much as digits as its factorization.

18629497 is an evil number, because the sum of its binary digits is even.

The product of its digits is 217728, while the sum is 46.

The square root of 18629497 is about 4316.1901023935. The cubic root of 18629497 is about 265.0942918280.

The spelling of 18629497 in words is "eighteen million, six hundred twenty-nine thousand, four hundred ninety-seven".