40598891 has 2 divisors, whose sum is σ = 40598892. Its totient is φ = 40598890.

The previous prime is 40598881. The next prime is 40598893. The reversal of 40598891 is 19889504.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 40598891 - 2⁶ = 40598827 is a prime.

Together with 40598893, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (40598893) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20299445 + 20299446.

It is an arithmetic number, because the mean of its divisors is an integer number (20299446).

Almost surely, 2^40598891 is an apocalyptic number.

40598891 is a deficient number, since it is larger than the sum of its proper divisors (1).

40598891 is an equidigital number, since it uses as much as digits as its factorization.

40598891 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 103680, while the sum is 44.

The square root of 40598891 is about 6371.7259043371. The cubic root of 40598891 is about 343.6935565287.

The spelling of 40598891 in words is "forty million, five hundred ninety-eight thousand, eight hundred ninety-one".