40100491 has 2 divisors, whose sum is σ = 40100492. Its totient is φ = 40100490.

The previous prime is 40100441. The next prime is 40100503. The reversal of 40100491 is 19400104.

40100491 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 40100491 - 2¹⁹ = 39576203 is a prime.

It is a Chen prime.

It is a pancake number, because a pancake can be divided into 40100491 parts by 8955 straight cuts.

It is not a weakly prime, because it can be changed into another prime (40100441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20050245 + 20050246.

It is an arithmetic number, because the mean of its divisors is an integer number (20050246).

Almost surely, 2^40100491 is an apocalyptic number.

40100491 is a deficient number, since it is larger than the sum of its proper divisors (1).

40100491 is an equidigital number, since it uses as much as digits as its factorization.

40100491 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 144, while the sum is 19.

The square root of 40100491 is about 6332.4948480042. The cubic root of 40100491 is about 342.2813451563.

Adding to 40100491 its reverse (19400104), we get a palindrome (59500595).

The spelling of 40100491 in words is "forty million, one hundred thousand, four hundred ninety-one".