40136069 has 4 divisors (see below), whose sum is σ = 40229196. Its totient is φ = 40042944.

The previous prime is 40136059. The next prime is 40136077. The reversal of 40136069 is 96063104.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 4255969 + 35880100 = 2063^2 + 5990^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40136069 is a prime.

It is a super-2 number, since 2×40136069² = 3221808069545522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40136039) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 45914 + ... + 46779.

It is an arithmetic number, because the mean of its divisors is an integer number (10057299).

Almost surely, 2^40136069 is an apocalyptic number.

It is an amenable number.

40136069 is a deficient number, since it is larger than the sum of its proper divisors (93127).

40136069 is an equidigital number, since it uses as much as digits as its factorization.

40136069 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93126.

The product of its (nonzero) digits is 3888, while the sum is 29.

The square root of 40136069 is about 6335.3033865791. The cubic root of 40136069 is about 342.3825416399.

The spelling of 40136069 in words is "forty million, one hundred thirty-six thousand, sixty-nine".