40164013 has 4 divisors (see below), whose sum is σ = 42526620. Its totient is φ = 37801408.

The previous prime is 40163999. The next prime is 40164017. The reversal of 40164013 is 31046104.

It is a happy number.

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 11573604 + 28590409 = 3402^2 + 5347^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40164013 is a prime.

It is a super-2 number, since 2×40164013² = 3226295880528338, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40164017) 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, 1181278 + ... + 1181311.

It is an arithmetic number, because the mean of its divisors is an integer number (10631655).

Almost surely, 2^40164013 is an apocalyptic number.

It is an amenable number.

40164013 is a deficient number, since it is larger than the sum of its proper divisors (2362607).

40164013 is a wasteful number, since it uses less digits than its factorization.

40164013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2362606.

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 40164013 is about 6337.5084220851. The cubic root of 40164013 is about 342.4619823893.

The spelling of 40164013 in words is "forty million, one hundred sixty-four thousand, thirteen".