40831961 has 4 divisors (see below), whose sum is σ = 40852452. Its totient is φ = 40811472.

The previous prime is 40831951. The next prime is 40831963. The reversal of 40831961 is 16913804.

It is a happy number.

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 12145225 + 28686736 = 3485^2 + 5356^2 .

It is a cyclic number.

It is not a de Polignac number, because 40831961 - 2¹⁸ = 40569817 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40831963) 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, 6890 + ... + 11363.

It is an arithmetic number, because the mean of its divisors is an integer number (10213113).

Almost surely, 2^40831961 is an apocalyptic number.

It is an amenable number.

40831961 is a deficient number, since it is larger than the sum of its proper divisors (20491).

40831961 is a wasteful number, since it uses less digits than its factorization.

40831961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20490.

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

The square root of 40831961 is about 6389.9891236214. The cubic root of 40831961 is about 344.3499936388.

The spelling of 40831961 in words is "forty million, eight hundred thirty-one thousand, nine hundred sixty-one".