4090997 has 2 divisors, whose sum is σ = 4090998. Its totient is φ = 4090996.

The previous prime is 4090991. The next prime is 4091011. The reversal of 4090997 is 7990904.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3511876 + 579121 = 1874^2 + 761^2 .

It is a cyclic number.

It is not a de Polignac number, because 4090997 - 2¹⁰ = 4089973 is a prime.

It is a plaindrome in base 11.

It is a self number, because there is not a number n which added to its sum of digits gives 4090997.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4090991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2045498 + 2045499.

It is an arithmetic number, because the mean of its divisors is an integer number (2045499).

Almost surely, 2^4090997 is an apocalyptic number.

It is an amenable number.

4090997 is a deficient number, since it is larger than the sum of its proper divisors (1).

4090997 is an equidigital number, since it uses as much as digits as its factorization.

4090997 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20412, while the sum is 38.

The square root of 4090997 is about 2022.6213189819. The cubic root of 4090997 is about 159.9348302301.

The spelling of 4090997 in words is "four million, ninety thousand, nine hundred ninety-seven".