40818497 has 2 divisors, whose sum is σ = 40818498. Its totient is φ = 40818496.

The previous prime is 40818469. The next prime is 40818499. The reversal of 40818497 is 79481804.

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., 38925121 + 1893376 = 6239^2 + 1376^2 .

It is a cyclic number.

It is not a de Polignac number, because 40818497 - 2⁶ = 40818433 is a prime.

It is a super-2 number, since 2×40818497² = 3332299394678018, which contains 22 as substring.

Together with 40818499, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (40818499) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20409248 + 20409249.

It is an arithmetic number, because the mean of its divisors is an integer number (20409249).

Almost surely, 2^40818497 is an apocalyptic number.

It is an amenable number.

40818497 is a deficient number, since it is larger than the sum of its proper divisors (1).

40818497 is an equidigital number, since it uses as much as digits as its factorization.

40818497 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 64512, while the sum is 41.

The square root of 40818497 is about 6388.9355138395. The cubic root of 40818497 is about 344.3121406278.

The spelling of 40818497 in words is "forty million, eight hundred eighteen thousand, four hundred ninety-seven".