40742869 has 2 divisors, whose sum is σ = 40742870. Its totient is φ = 40742868.

The previous prime is 40742857. The next prime is 40742893. The reversal of 40742869 is 96824704.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 37638225 + 3104644 = 6135^2 + 1762^2 .

It is a cyclic number.

It is not a de Polignac number, because 40742869 - 2⁵ = 40742837 is a prime.

It is a super-2 number, since 2×40742869² = 3319962748702322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40742839) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20371434 + 20371435.

It is an arithmetic number, because the mean of its divisors is an integer number (20371435).

Almost surely, 2^40742869 is an apocalyptic number.

It is an amenable number.

40742869 is a deficient number, since it is larger than the sum of its proper divisors (1).

40742869 is an equidigital number, since it uses as much as digits as its factorization.

40742869 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 40742869 is about 6383.0140999374. The cubic root of 40742869 is about 344.0993634228.

The spelling of 40742869 in words is "forty million, seven hundred forty-two thousand, eight hundred sixty-nine".