40955819 has 2 divisors, whose sum is σ = 40955820. Its totient is φ = 40955818.

The previous prime is 40955813. The next prime is 40955851. The reversal of 40955819 is 91855904.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 40955819 - 2²⁴ = 24178603 is a prime.

It is a super-2 number, since 2×40955819² = 3354758219921522, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (40955813) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20477909 + 20477910.

It is an arithmetic number, because the mean of its divisors is an integer number (20477910).

Almost surely, 2^40955819 is an apocalyptic number.

40955819 is a deficient number, since it is larger than the sum of its proper divisors (1).

40955819 is an equidigital number, since it uses as much as digits as its factorization.

40955819 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 64800, while the sum is 41.

The square root of 40955819 is about 6399.6733510391. The cubic root of 40955819 is about 344.6978212411.

It can be divided in two parts, 40955 and 819, that multiplied together give a triangular number (33542145 = T₈₁₉₀).

The spelling of 40955819 in words is "forty million, nine hundred fifty-five thousand, eight hundred nineteen".