41890391 has 2 divisors, whose sum is σ = 41890392. Its totient is φ = 41890390.

The previous prime is 41890361. The next prime is 41890399. The reversal of 41890391 is 19309814.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-41890391 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (41890399) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20945195 + 20945196.

It is an arithmetic number, because the mean of its divisors is an integer number (20945196).

Almost surely, 2^41890391 is an apocalyptic number.

41890391 is a deficient number, since it is larger than the sum of its proper divisors (1).

41890391 is an equidigital number, since it uses as much as digits as its factorization.

41890391 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7776, while the sum is 35.

The square root of 41890391 is about 6472.2786559295. The cubic root of 41890391 is about 347.3000170871.

It can be divided in two parts, 418 and 90391, that added together give a palindrome (90809).

The spelling of 41890391 in words is "forty-one million, eight hundred ninety thousand, three hundred ninety-one".