40012013 has 4 divisors (see below), whose sum is σ = 40280700. Its totient is φ = 39743328.

The previous prime is 40012003. The next prime is 40012051. The reversal of 40012013 is 31021004.

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 3988009 + 36024004 = 1997^2 + 6002^2 .

It is a cyclic number.

It is not a de Polignac number, because 40012013 - 2⁸ = 40011757 is a prime.

It is a super-2 number, since 2×40012013² = 3201922368624338, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 40011985 and 40012003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40012003) 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, 134120 + ... + 134417.

It is an arithmetic number, because the mean of its divisors is an integer number (10070175).

Almost surely, 2^40012013 is an apocalyptic number.

It is an amenable number.

40012013 is a deficient number, since it is larger than the sum of its proper divisors (268687).

40012013 is a wasteful number, since it uses less digits than its factorization.

40012013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 268686.

The product of its (nonzero) digits is 24, while the sum is 11.

The square root of 40012013 is about 6325.5049600803. The cubic root of 40012013 is about 342.0294224770.

Adding to 40012013 its reverse (31021004), we get a palindrome (71033017).

The spelling of 40012013 in words is "forty million, twelve thousand, thirteen".