40906819 has 2 divisors, whose sum is σ = 40906820. Its totient is φ = 40906818.

The previous prime is 40906813. The next prime is 40906837. The reversal of 40906819 is 91860904.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 40906819 - 2⁵ = 40906787 is a prime.

It is a super-2 number, since 2×40906819² = 3346735681397522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (40906813) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20453409 + 20453410.

It is an arithmetic number, because the mean of its divisors is an integer number (20453410).

Almost surely, 2^40906819 is an apocalyptic number.

40906819 is a deficient number, since it is larger than the sum of its proper divisors (1).

40906819 is an equidigital number, since it uses as much as digits as its factorization.

40906819 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15552, while the sum is 37.

The square root of 40906819 is about 6395.8438848990. The cubic root of 40906819 is about 344.5602996060.

The spelling of 40906819 in words is "forty million, nine hundred six thousand, eight hundred nineteen".