40691471 has 2 divisors, whose sum is σ = 40691472. Its totient is φ = 40691470.

The previous prime is 40691467. The next prime is 40691473. The reversal of 40691471 is 17419604.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 40691471 - 2² = 40691467 is a prime.

It is a super-3 number, since 3×40691471³ (a number of 24 digits) contains 333 as substring.

Together with 40691473, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40691473) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20345735 + 20345736.

It is an arithmetic number, because the mean of its divisors is an integer number (20345736).

Almost surely, 2^40691471 is an apocalyptic number.

40691471 is a deficient number, since it is larger than the sum of its proper divisors (1).

40691471 is an equidigital number, since it uses as much as digits as its factorization.

40691471 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6048, while the sum is 32.

The square root of 40691471 is about 6378.9866750135. The cubic root of 40691471 is about 343.9546063006.

The spelling of 40691471 in words is "forty million, six hundred ninety-one thousand, four hundred seventy-one".