40724869 has 2 divisors, whose sum is σ = 40724870. Its totient is φ = 40724868.

The previous prime is 40724839. The next prime is 40724897. The reversal of 40724869 is 96842704.

40724869 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 28037025 + 12687844 = 5295^2 + 3562^2 .

It is a cyclic number.

It is not a de Polignac number, because 40724869 - 2¹⁷ = 40593797 is a prime.

It is a super-2 number, since 2×40724869² = 3317029910134322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40724839) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20362434 + 20362435.

It is an arithmetic number, because the mean of its divisors is an integer number (20362435).

Almost surely, 2^40724869 is an apocalyptic number.

It is an amenable number.

40724869 is a deficient number, since it is larger than the sum of its proper divisors (1).

40724869 is an equidigital number, since it uses as much as digits as its factorization.

40724869 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 96768, while the sum is 40.

The square root of 40724869 is about 6381.6039519857. The cubic root of 40724869 is about 344.0486821539.

The spelling of 40724869 in words is "forty million, seven hundred twenty-four thousand, eight hundred sixty-nine".