40878547 has 2 divisors, whose sum is σ = 40878548. Its totient is φ = 40878546.

The previous prime is 40878533. The next prime is 40878571. The reversal of 40878547 is 74587804.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40878547 is a prime.

It is not a weakly prime, because it can be changed into another prime (40878527) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20439273 + 20439274.

It is an arithmetic number, because the mean of its divisors is an integer number (20439274).

Almost surely, 2^40878547 is an apocalyptic number.

40878547 is a deficient number, since it is larger than the sum of its proper divisors (1).

40878547 is an equidigital number, since it uses as much as digits as its factorization.

40878547 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 250880, while the sum is 43.

The square root of 40878547 is about 6393.6333176059. The cubic root of 40878547 is about 344.4809024615.

The spelling of 40878547 in words is "forty million, eight hundred seventy-eight thousand, five hundred forty-seven".