40817129 has 4 divisors (see below), whose sum is σ = 41042820. Its totient is φ = 40591440.

The previous prime is 40817093. The next prime is 40817141. The reversal of 40817129 is 92171804.

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 1817104 + 39000025 = 1348^2 + 6245^2 .

It is a cyclic number.

It is not a de Polignac number, because 40817129 - 2⁸ = 40816873 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 40817095 and 40817104.

It is not an unprimeable number, because it can be changed into a prime (40817729) 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, 112574 + ... + 112935.

It is an arithmetic number, because the mean of its divisors is an integer number (10260705).

Almost surely, 2^40817129 is an apocalyptic number.

It is an amenable number.

40817129 is a deficient number, since it is larger than the sum of its proper divisors (225691).

40817129 is a wasteful number, since it uses less digits than its factorization.

40817129 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 225690.

The product of its (nonzero) digits is 4032, while the sum is 32.

The square root of 40817129 is about 6388.8284528542. The cubic root of 40817129 is about 344.3082941341.

The spelling of 40817129 in words is "forty million, eight hundred seventeen thousand, one hundred twenty-nine".