40207291 has 2 divisors, whose sum is σ = 40207292. Its totient is φ = 40207290.

The previous prime is 40207273. The next prime is 40207309. The reversal of 40207291 is 19270204.

It is a balanced prime because it is at equal distance from previous prime (40207273) and next prime (40207309).

It is a cyclic number.

It is not a de Polignac number, because 40207291 - 2¹³ = 40199099 is a prime.

It is not a weakly prime, because it can be changed into another prime (40207201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20103645 + 20103646.

It is an arithmetic number, because the mean of its divisors is an integer number (20103646).

Almost surely, 2^40207291 is an apocalyptic number.

40207291 is a deficient number, since it is larger than the sum of its proper divisors (1).

40207291 is an equidigital number, since it uses as much as digits as its factorization.

40207291 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1008, while the sum is 25.

The square root of 40207291 is about 6340.9219361225. The cubic root of 40207291 is about 342.5849427906.

Adding to 40207291 its reverse (19270204), we get a palindrome (59477495).

It can be divided in two parts, 4020 and 7291, that added together give a palindrome (11311).

The spelling of 40207291 in words is "forty million, two hundred seven thousand, two hundred ninety-one".