40153609 has 4 divisors (see below), whose sum is σ = 42515604. Its totient is φ = 37791616.

The previous prime is 40153601. The next prime is 40153627. The reversal of 40153609 is 90635104.

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 11370384 + 28783225 = 3372^2 + 5365^2 .

It is a cyclic number.

It is not a de Polignac number, because 40153609 - 2³ = 40153601 is a prime.

It is a super-2 number, since 2×40153609² = 3224624631449762, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40153601) 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, 1180972 + ... + 1181005.

It is an arithmetic number, because the mean of its divisors is an integer number (10628901).

Almost surely, 2^40153609 is an apocalyptic number.

It is an amenable number.

40153609 is a deficient number, since it is larger than the sum of its proper divisors (2361995).

40153609 is a wasteful number, since it uses less digits than its factorization.

40153609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2361994.

The product of its (nonzero) digits is 3240, while the sum is 28.

The square root of 40153609 is about 6336.6875416104. The cubic root of 40153609 is about 342.4324096293.

The spelling of 40153609 in words is "forty million, one hundred fifty-three thousand, six hundred nine".