40017613 has 4 divisors (see below), whose sum is σ = 40043260. Its totient is φ = 39991968.

The previous prime is 40017611. The next prime is 40017617. The reversal of 40017613 is 31671004.

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 19342404 + 20675209 = 4398^2 + 4547^2 .

It is a cyclic number.

It is not a de Polignac number, because 40017613 - 2¹ = 40017611 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40017611) 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, 10320 + ... + 13657.

It is an arithmetic number, because the mean of its divisors is an integer number (10010815).

Almost surely, 2^40017613 is an apocalyptic number.

It is an amenable number.

40017613 is a deficient number, since it is larger than the sum of its proper divisors (25647).

40017613 is a wasteful number, since it uses less digits than its factorization.

40017613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25646.

The product of its (nonzero) digits is 504, while the sum is 22.

The square root of 40017613 is about 6325.9475970008. The cubic root of 40017613 is about 342.0453783135.

Adding to 40017613 its reverse (31671004), we get a palindrome (71688617).

The spelling of 40017613 in words is "forty million, seventeen thousand, six hundred thirteen".