40813691 has 8 divisors (see below), whose sum is σ = 43507200. Its totient is φ = 38174760.

The previous prime is 40813687. The next prime is 40813693. The reversal of 40813691 is 19631804.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 40813691 - 2² = 40813687 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40813693) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12095 + ... + 15096.

It is an arithmetic number, because the mean of its divisors is an integer number (5438400).

Almost surely, 2^40813691 is an apocalyptic number.

40813691 is a deficient number, since it is larger than the sum of its proper divisors (2693509).

40813691 is a wasteful number, since it uses less digits than its factorization.

40813691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27289.

The product of its (nonzero) digits is 5184, while the sum is 32.

The square root of 40813691 is about 6388.5593837735. The cubic root of 40813691 is about 344.2986269088.

The spelling of 40813691 in words is "forty million, eight hundred thirteen thousand, six hundred ninety-one".