40517549 has 2 divisors, whose sum is σ = 40517550. Its totient is φ = 40517548.

The previous prime is 40517509. The next prime is 40517551. The reversal of 40517549 is 94571504.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 30052324 + 10465225 = 5482^2 + 3235^2 .

It is a cyclic number.

It is not a de Polignac number, because 40517549 - 2⁸ = 40517293 is a prime.

Together with 40517551, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40517509) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20258774 + 20258775.

It is an arithmetic number, because the mean of its divisors is an integer number (20258775).

Almost surely, 2^40517549 is an apocalyptic number.

It is an amenable number.

40517549 is a deficient number, since it is larger than the sum of its proper divisors (1).

40517549 is an equidigital number, since it uses as much as digits as its factorization.

40517549 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 25200, while the sum is 35.

The square root of 40517549 is about 6365.3396610079. The cubic root of 40517549 is about 343.4638670609.

It can be divided in two parts, 405175 and 49, that added together give a cube (405224 = 74³).

The spelling of 40517549 in words is "forty million, five hundred seventeen thousand, five hundred forty-nine".