40091347 has 2 divisors, whose sum is σ = 40091348. Its totient is φ = 40091346.

The previous prime is 40091341. The next prime is 40091377. The reversal of 40091347 is 74319004.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40091347 is a prime.

It is a super-2 number, since 2×40091347² = 3214632208548818, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (40091341) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20045673 + 20045674.

It is an arithmetic number, because the mean of its divisors is an integer number (20045674).

Almost surely, 2^40091347 is an apocalyptic number.

40091347 is a deficient number, since it is larger than the sum of its proper divisors (1).

40091347 is an equidigital number, since it uses as much as digits as its factorization.

40091347 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3024, while the sum is 28.

The square root of 40091347 is about 6331.7728165183. The cubic root of 40091347 is about 342.2553267007.

It can be divided in two parts, 400913 and 47, that added together give a triangular number (400960 = T₈₉₅).

The spelling of 40091347 in words is "forty million, ninety-one thousand, three hundred forty-seven".