40839131 has 4 divisors (see below), whose sum is σ = 40861200. Its totient is φ = 40817064.

The previous prime is 40839107. The next prime is 40839143. The reversal of 40839131 is 13193804.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 40839131 - 2²² = 36644827 is a prime.

It is a super-2 number, since 2×40839131² = 3335669241670322, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 40839094 and 40839103.

It is not an unprimeable number, because it can be changed into a prime (40839101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7976 + ... + 12053.

It is an arithmetic number, because the mean of its divisors is an integer number (10215300).

Almost surely, 2^40839131 is an apocalyptic number.

40839131 is a deficient number, since it is larger than the sum of its proper divisors (22069).

40839131 is a wasteful number, since it uses less digits than its factorization.

40839131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22068.

The product of its (nonzero) digits is 2592, while the sum is 29.

The square root of 40839131 is about 6390.5501328133. The cubic root of 40839131 is about 344.3701481525.

The spelling of 40839131 in words is "forty million, eight hundred thirty-nine thousand, one hundred thirty-one".