40191611 has 2 divisors, whose sum is σ = 40191612. Its totient is φ = 40191610.

The previous prime is 40191601. The next prime is 40191617. The reversal of 40191611 is 11619104.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 40191611 - 2²² = 35997307 is a prime.

It is a Sophie Germain prime.

It is equal to p_2444603 and since 40191611 and 2444603 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (40191617) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20095805 + 20095806.

It is an arithmetic number, because the mean of its divisors is an integer number (20095806).

Almost surely, 2^40191611 is an apocalyptic number.

40191611 is a deficient number, since it is larger than the sum of its proper divisors (1).

40191611 is an equidigital number, since it uses as much as digits as its factorization.

40191611 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 216, while the sum is 23.

The square root of 40191611 is about 6339.6854022893. The cubic root of 40191611 is about 342.5404033534.

The spelling of 40191611 in words is "forty million, one hundred ninety-one thousand, six hundred eleven".