40610891 has 2 divisors, whose sum is σ = 40610892. Its totient is φ = 40610890.

The previous prime is 40610863. The next prime is 40610903. The reversal of 40610891 is 19801604.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 40610891 - 2¹⁰ = 40609867 is a prime.

It is not a weakly prime, because it can be changed into another prime (40610851) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20305445 + 20305446.

It is an arithmetic number, because the mean of its divisors is an integer number (20305446).

Almost surely, 2^40610891 is an apocalyptic number.

40610891 is a deficient number, since it is larger than the sum of its proper divisors (1).

40610891 is an equidigital number, since it uses as much as digits as its factorization.

40610891 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1728, while the sum is 29.

The square root of 40610891 is about 6372.6674948565. The cubic root of 40610891 is about 343.7274155520.

The spelling of 40610891 in words is "forty million, six hundred ten thousand, eight hundred ninety-one".