40345117 has 4 divisors (see below), whose sum is σ = 40374016. Its totient is φ = 40316220.

The previous prime is 40345103. The next prime is 40345139. The reversal of 40345117 is 71154304.

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 a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40345117 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 40345091 and 40345100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40345187) 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, 12243 + ... + 15184.

It is an arithmetic number, because the mean of its divisors is an integer number (10093504).

Almost surely, 2^40345117 is an apocalyptic number.

It is an amenable number.

40345117 is a deficient number, since it is larger than the sum of its proper divisors (28899).

40345117 is a wasteful number, since it uses less digits than its factorization.

40345117 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28898.

The product of its (nonzero) digits is 1680, while the sum is 25.

The square root of 40345117 is about 6351.7806164886. The cubic root of 40345117 is about 342.9759437098.

The spelling of 40345117 in words is "forty million, three hundred forty-five thousand, one hundred seventeen".