40804997 has 2 divisors, whose sum is σ = 40804998. Its totient is φ = 40804996.

The previous prime is 40804993. The next prime is 40805033. The reversal of 40804997 is 79940804.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 25391521 + 15413476 = 5039^2 + 3926^2 .

It is a cyclic number.

It is not a de Polignac number, because 40804997 - 2² = 40804993 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40804993) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20402498 + 20402499.

It is an arithmetic number, because the mean of its divisors is an integer number (20402499).

Almost surely, 2^40804997 is an apocalyptic number.

It is an amenable number.

40804997 is a deficient number, since it is larger than the sum of its proper divisors (1).

40804997 is an equidigital number, since it uses as much as digits as its factorization.

40804997 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72576, while the sum is 41.

The square root of 40804997 is about 6387.8789124403. The cubic root of 40804997 is about 344.2741780473.

The spelling of 40804997 in words is "forty million, eight hundred four thousand, nine hundred ninety-seven".