40191113 has 2 divisors, whose sum is σ = 40191114. Its totient is φ = 40191112.

The previous prime is 40191101. The next prime is 40191133. The reversal of 40191113 is 31119104.

It is an a-pointer prime, because the next prime (40191133) can be obtained adding 40191113 to its sum of digits (20).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 37797904 + 2393209 = 6148^2 + 1547^2 .

It is a cyclic number.

It is not a de Polignac number, because 40191113 - 2²² = 35996809 is a prime.

It is not a weakly prime, because it can be changed into another prime (40191133) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20095556 + 20095557.

It is an arithmetic number, because the mean of its divisors is an integer number (20095557).

Almost surely, 2^40191113 is an apocalyptic number.

It is an amenable number.

40191113 is a deficient number, since it is larger than the sum of its proper divisors (1).

40191113 is an equidigital number, since it uses as much as digits as its factorization.

40191113 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 108, while the sum is 20.

The square root of 40191113 is about 6339.6461257707. The cubic root of 40191113 is about 342.5389885820.

It can be divided in two parts, 40191 and 113, that added together give a palindrome (40304).

The spelling of 40191113 in words is "forty million, one hundred ninety-one thousand, one hundred thirteen".