40981313 has 2 divisors, whose sum is σ = 40981314. Its totient is φ = 40981312.

The previous prime is 40981307. The next prime is 40981337. The reversal of 40981313 is 31318904.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21418384 + 19562929 = 4628^2 + 4423^2 .

It is a cyclic number.

It is not a de Polignac number, because 40981313 - 2¹⁸ = 40719169 is a prime.

It is not a weakly prime, because it can be changed into another prime (40984313) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20490656 + 20490657.

It is an arithmetic number, because the mean of its divisors is an integer number (20490657).

Almost surely, 2^40981313 is an apocalyptic number.

It is an amenable number.

40981313 is a deficient number, since it is larger than the sum of its proper divisors (1).

40981313 is an equidigital number, since it uses as much as digits as its factorization.

40981313 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2592, while the sum is 29.

The square root of 40981313 is about 6401.6648615809. The cubic root of 40981313 is about 344.7693284060.

The spelling of 40981313 in words is "forty million, nine hundred eighty-one thousand, three hundred thirteen".