40603891 has 2 divisors, whose sum is σ = 40603892. Its totient is φ = 40603890.

The previous prime is 40603889. The next prime is 40603903. The reversal of 40603891 is 19830604.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 40603891 - 2¹ = 40603889 is a prime.

Together with 40603889, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (40603861) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20301945 + 20301946.

It is an arithmetic number, because the mean of its divisors is an integer number (20301946).

Almost surely, 2^40603891 is an apocalyptic number.

40603891 is a deficient number, since it is larger than the sum of its proper divisors (1).

40603891 is an equidigital number, since it uses as much as digits as its factorization.

40603891 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5184, while the sum is 31.

The square root of 40603891 is about 6372.1182506291. The cubic root of 40603891 is about 343.7076652658.

The spelling of 40603891 in words is "forty million, six hundred three thousand, eight hundred ninety-one".