40861519 has 2 divisors, whose sum is σ = 40861520. Its totient is φ = 40861518.

The previous prime is 40861517. The next prime is 40861529. The reversal of 40861519 is 91516804.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 40861519 - 2¹ = 40861517 is a prime.

It is a super-2 number, since 2×40861519² = 3339327469974722, which contains 22 as substring.

Together with 40861517, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40861517) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20430759 + 20430760.

It is an arithmetic number, because the mean of its divisors is an integer number (20430760).

Almost surely, 2^40861519 is an apocalyptic number.

40861519 is a deficient number, since it is larger than the sum of its proper divisors (1).

40861519 is an equidigital number, since it uses as much as digits as its factorization.

40861519 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8640, while the sum is 34.

The square root of 40861519 is about 6392.3015416984. The cubic root of 40861519 is about 344.4330645294.

The spelling of 40861519 in words is "forty million, eight hundred sixty-one thousand, five hundred nineteen".