18649097 has 2 divisors, whose sum is σ = 18649098. Its totient is φ = 18649096.

The previous prime is 18649093. The next prime is 18649109. The reversal of 18649097 is 79094681.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14409616 + 4239481 = 3796^2 + 2059^2 .

It is a cyclic number.

It is not a de Polignac number, because 18649097 - 2² = 18649093 is a prime.

It is not a weakly prime, because it can be changed into another prime (18649093) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9324548 + 9324549.

It is an arithmetic number, because the mean of its divisors is an integer number (9324549).

Almost surely, 2^18649097 is an apocalyptic number.

It is an amenable number.

18649097 is a deficient number, since it is larger than the sum of its proper divisors (1).

18649097 is an equidigital number, since it uses as much as digits as its factorization.

18649097 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 108864, while the sum is 44.

The square root of 18649097 is about 4318.4600264446. The cubic root of 18649097 is about 265.1872273665.

The spelling of 18649097 in words is "eighteen million, six hundred forty-nine thousand, ninety-seven".