18083987497 has 2 divisors, whose sum is σ = 18083987498. Its totient is φ = 18083987496.

The previous prime is 18083987437. The next prime is 18083987501. The reversal of 18083987497 is 79478938081.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17651513881 + 432473616 = 132859^2 + 20796^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18083987497 is a prime.

It is not a weakly prime, because it can be changed into another prime (18083987437) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9041993748 + 9041993749.

It is an arithmetic number, because the mean of its divisors is an integer number (9041993749).

Almost surely, 2^18083987497 is an apocalyptic number.

It is an amenable number.

18083987497 is a deficient number, since it is larger than the sum of its proper divisors (1).

18083987497 is an equidigital number, since it uses as much as digits as its factorization.

18083987497 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 24385536, while the sum is 64.

The spelling of 18083987497 in words is "eighteen billion, eighty-three million, nine hundred eighty-seven thousand, four hundred ninety-seven".