40345313 has 4 divisors (see below), whose sum is σ = 40722480. Its totient is φ = 39968148.

The previous prime is 40345297. The next prime is 40345367. The reversal of 40345313 is 31354304.

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 not a de Polignac number, because 40345313 - 2⁴ = 40345297 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (40344313) 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, 188423 + ... + 188636.

It is an arithmetic number, because the mean of its divisors is an integer number (10180620).

Almost surely, 2^40345313 is an apocalyptic number.

It is an amenable number.

40345313 is a deficient number, since it is larger than the sum of its proper divisors (377167).

40345313 is a wasteful number, since it uses less digits than its factorization.

40345313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 377166.

The product of its (nonzero) digits is 2160, while the sum is 23.

The square root of 40345313 is about 6351.7960452143. The cubic root of 40345313 is about 342.9764991109.

Adding to 40345313 its reverse (31354304), we get a palindrome (71699617).

The spelling of 40345313 in words is "forty million, three hundred forty-five thousand, three hundred thirteen".