40981547 has 2 divisors, whose sum is σ = 40981548. Its totient is φ = 40981546.

The previous prime is 40981531. The next prime is 40981573. The reversal of 40981547 is 74518904.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 40981547 - 2⁴ = 40981531 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 40981547.

It is not a weakly prime, because it can be changed into another prime (40581547) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20490773 + 20490774.

It is an arithmetic number, because the mean of its divisors is an integer number (20490774).

Almost surely, 2^40981547 is an apocalyptic number.

40981547 is a deficient number, since it is larger than the sum of its proper divisors (1).

40981547 is an equidigital number, since it uses as much as digits as its factorization.

40981547 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 40320, while the sum is 38.

The square root of 40981547 is about 6401.6831380505. The cubic root of 40981547 is about 344.7699846064.

The spelling of 40981547 in words is "forty million, nine hundred eighty-one thousand, five hundred forty-seven".