40947013 has 4 divisors (see below), whose sum is σ = 41207980. Its totient is φ = 40686048.

The previous prime is 40947007. The next prime is 40947029. The reversal of 40947013 is 31074904.

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 16176484 + 24770529 = 4022^2 + 4977^2 .

It is a cyclic number.

It is not a de Polignac number, because 40947013 - 2²¹ = 38849861 is a prime.

It is a super-3 number, since 3×40947013³ (a number of 24 digits) contains 333 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 (40941013) 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, 130248 + ... + 130561.

It is an arithmetic number, because the mean of its divisors is an integer number (10301995).

Almost surely, 2^40947013 is an apocalyptic number.

It is an amenable number.

40947013 is a deficient number, since it is larger than the sum of its proper divisors (260967).

40947013 is a wasteful number, since it uses less digits than its factorization.

40947013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 260966.

The product of its (nonzero) digits is 3024, while the sum is 28.

The square root of 40947013 is about 6398.9853101879. The cubic root of 40947013 is about 344.6731147268.

The spelling of 40947013 in words is "forty million, nine hundred forty-seven thousand, thirteen".