40117813 has 4 divisors (see below), whose sum is σ = 41411968. Its totient is φ = 38823660.

The previous prime is 40117811. The next prime is 40117829. The reversal of 40117813 is 31871104.

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 a cyclic number.

It is not a de Polignac number, because 40117813 - 2¹ = 40117811 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 (40117811) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 647031 + ... + 647092.

It is an arithmetic number, because the mean of its divisors is an integer number (10352992).

Almost surely, 2^40117813 is an apocalyptic number.

It is an amenable number.

40117813 is a deficient number, since it is larger than the sum of its proper divisors (1294155).

40117813 is a wasteful number, since it uses less digits than its factorization.

40117813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1294154.

The product of its (nonzero) digits is 672, while the sum is 25.

The square root of 40117813 is about 6333.8624077256. The cubic root of 40117813 is about 342.3306225576.

Adding to 40117813 its reverse (31871104), we get a palindrome (71988917).

The spelling of 40117813 in words is "forty million, one hundred seventeen thousand, eight hundred thirteen".