40134813 has 4 divisors (see below), whose sum is σ = 53513088. Its totient is φ = 26756540.

The previous prime is 40134803. The next prime is 40134823. The reversal of 40134813 is 31843104.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (40134803) and next prime (40134823).

It is a cyclic number.

It is not a de Polignac number, because 40134813 - 2⁶ = 40134749 is a prime.

It is a super-2 number, since 2×40134813² = 3221606429089938, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40134803) 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, 6689133 + ... + 6689138.

It is an arithmetic number, because the mean of its divisors is an integer number (13378272).

Almost surely, 2^40134813 is an apocalyptic number.

It is an amenable number.

40134813 is a deficient number, since it is larger than the sum of its proper divisors (13378275).

40134813 is a wasteful number, since it uses less digits than its factorization.

40134813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13378274.

The product of its (nonzero) digits is 1152, while the sum is 24.

The square root of 40134813 is about 6335.2042587434. The cubic root of 40134813 is about 342.3789701479.

Adding to 40134813 its reverse (31843104), we get a palindrome (71977917).

The spelling of 40134813 in words is "forty million, one hundred thirty-four thousand, eight hundred thirteen".