40889819 has 2 divisors, whose sum is σ = 40889820. Its totient is φ = 40889818.

The previous prime is 40889759. The next prime is 40889831. The reversal of 40889819 is 91898804.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40889819 is a prime.

It is a super-2 number, since 2×40889819² = 3343954595705522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (40889839) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20444909 + 20444910.

It is an arithmetic number, because the mean of its divisors is an integer number (20444910).

Almost surely, 2^40889819 is an apocalyptic number.

40889819 is a deficient number, since it is larger than the sum of its proper divisors (1).

40889819 is an equidigital number, since it uses as much as digits as its factorization.

40889819 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 165888, while the sum is 47.

The square root of 40889819 is about 6394.5147587600. The cubic root of 40889819 is about 344.5125623595.

The spelling of 40889819 in words is "forty million, eight hundred eighty-nine thousand, eight hundred nineteen".