40570913 has 4 divisors (see below), whose sum is σ = 41969940. Its totient is φ = 39171888.

The previous prime is 40570889. The next prime is 40570927. The reversal of 40570913 is 31907504.

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 28654609 + 11916304 = 5353^2 + 3452^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40570913 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (29), and also a Moran number because the ratio is a prime number: 1398997 = 40570913 / (4 + 0 + 5 + 7 + 0 + 9 + 1 + 3).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40570963) 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, 699470 + ... + 699527.

It is an arithmetic number, because the mean of its divisors is an integer number (10492485).

Almost surely, 2^40570913 is an apocalyptic number.

It is an amenable number.

40570913 is a deficient number, since it is larger than the sum of its proper divisors (1399027).

40570913 is a wasteful number, since it uses less digits than its factorization.

40570913 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1399026.

The product of its (nonzero) digits is 3780, while the sum is 29.

The square root of 40570913 is about 6369.5300454586. The cubic root of 40570913 is about 343.6145882958.

The spelling of 40570913 in words is "forty million, five hundred seventy thousand, nine hundred thirteen".