40173491 has 2 divisors, whose sum is σ = 40173492. Its totient is φ = 40173490.

The previous prime is 40173461. The next prime is 40173517. The reversal of 40173491 is 19437104.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 40173491 - 2²² = 35979187 is a prime.

It is a super-2 number, since 2×40173491² = 3227818758254162, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (40173461) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20086745 + 20086746.

It is an arithmetic number, because the mean of its divisors is an integer number (20086746).

Almost surely, 2^40173491 is an apocalyptic number.

40173491 is a deficient number, since it is larger than the sum of its proper divisors (1).

40173491 is an equidigital number, since it uses as much as digits as its factorization.

40173491 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3024, while the sum is 29.

The square root of 40173491 is about 6338.2561481846. The cubic root of 40173491 is about 342.4889186036.

The spelling of 40173491 in words is "forty million, one hundred seventy-three thousand, four hundred ninety-one".