40984861 has 2 divisors, whose sum is σ = 40984862. Its totient is φ = 40984860.

The previous prime is 40984849. The next prime is 40984877. The reversal of 40984861 is 16848904.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 35176761 + 5808100 = 5931^2 + 2410^2 .

It is a cyclic number.

It is not a de Polignac number, because 40984861 - 2⁵ = 40984829 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40984831) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20492430 + 20492431.

It is an arithmetic number, because the mean of its divisors is an integer number (20492431).

Almost surely, 2^40984861 is an apocalyptic number.

It is an amenable number.

40984861 is a deficient number, since it is larger than the sum of its proper divisors (1).

40984861 is an equidigital number, since it uses as much as digits as its factorization.

40984861 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 55296, while the sum is 40.

The square root of 40984861 is about 6401.9419709960. The cubic root of 40984861 is about 344.7792777072.

The spelling of 40984861 in words is "forty million, nine hundred eighty-four thousand, eight hundred sixty-one".