40297609 has 4 divisors (see below), whose sum is σ = 43961040. Its totient is φ = 36634180.

The previous prime is 40297597. The next prime is 40297639. The reversal of 40297609 is 90679204.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 40297609 - 2⁵ = 40297577 is a prime.

It is a super-2 number, since 2×40297609² = 3247794582233762, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40297639) 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, 1831699 + ... + 1831720.

It is an arithmetic number, because the mean of its divisors is an integer number (10990260).

Almost surely, 2^40297609 is an apocalyptic number.

It is an amenable number.

40297609 is a deficient number, since it is larger than the sum of its proper divisors (3663431).

40297609 is a wasteful number, since it uses less digits than its factorization.

40297609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3663430.

The product of its (nonzero) digits is 27216, while the sum is 37.

The square root of 40297609 is about 6348.0397761829. The cubic root of 40297609 is about 342.8412681721.

The spelling of 40297609 in words is "forty million, two hundred ninety-seven thousand, six hundred nine".