40591249 has 2 divisors, whose sum is σ = 40591250. Its totient is φ = 40591248.

The previous prime is 40591247. The next prime is 40591253. The reversal of 40591249 is 94219504.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 40094224 + 497025 = 6332^2 + 705^2 .

It is a cyclic number.

It is not a de Polignac number, because 40591249 - 2¹ = 40591247 is a prime.

Together with 40591247, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (40591247) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20295624 + 20295625.

It is an arithmetic number, because the mean of its divisors is an integer number (20295625).

Almost surely, 2^40591249 is an apocalyptic number.

It is an amenable number.

40591249 is a deficient number, since it is larger than the sum of its proper divisors (1).

40591249 is an equidigital number, since it uses as much as digits as its factorization.

40591249 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12960, while the sum is 34.

The square root of 40591249 is about 6371.1261955796. The cubic root of 40591249 is about 343.6719904965.

The spelling of 40591249 in words is "forty million, five hundred ninety-one thousand, two hundred forty-nine".