40010291 has 2 divisors, whose sum is σ = 40010292. Its totient is φ = 40010290.

The previous prime is 40010279. The next prime is 40010309. The reversal of 40010291 is 19201004.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 40010291 - 2²² = 35815987 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (40010221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20005145 + 20005146.

It is an arithmetic number, because the mean of its divisors is an integer number (20005146).

Almost surely, 2^40010291 is an apocalyptic number.

40010291 is a deficient number, since it is larger than the sum of its proper divisors (1).

40010291 is an equidigital number, since it uses as much as digits as its factorization.

40010291 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72, while the sum is 17.

The square root of 40010291 is about 6325.3688430004. The cubic root of 40010291 is about 342.0245157579.

Adding to 40010291 its reverse (19201004), we get a palindrome (59211295).

The spelling of 40010291 in words is "forty million, ten thousand, two hundred ninety-one".