40506769 has 2 divisors, whose sum is σ = 40506770. Its totient is φ = 40506768.

The previous prime is 40506761. The next prime is 40506773. The reversal of 40506769 is 96760504.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 40132225 + 374544 = 6335^2 + 612^2 .

It is a cyclic number.

It is not a de Polignac number, because 40506769 - 2³ = 40506761 is a prime.

It is a super-2 number, since 2×40506769² = 3281596669638722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (40506761) 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, 20253384 + 20253385.

It is an arithmetic number, because the mean of its divisors is an integer number (20253385).

Almost surely, 2^40506769 is an apocalyptic number.

It is an amenable number.

40506769 is a deficient number, since it is larger than the sum of its proper divisors (1).

40506769 is an equidigital number, since it uses as much as digits as its factorization.

40506769 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 45360, while the sum is 37.

The square root of 40506769 is about 6364.4928313260. The cubic root of 40506769 is about 343.4334039736.

The spelling of 40506769 in words is "forty million, five hundred six thousand, seven hundred sixty-nine".