940596581 has 4 divisors (see below), whose sum is σ = 940661772. Its totient is φ = 940531392.

The previous prime is 940596563. The next prime is 940596583. The reversal of 940596581 is 185695049.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 493950625 + 446645956 = 22225^2 + 21134^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-940596581 is a prime.

It is a super-2 number, since 2×940596581² = 1769443856377779122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (940596583) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 260 + ... + 43373.

It is an arithmetic number, because the mean of its divisors is an integer number (235165443).

Almost surely, 2^940596581 is an apocalyptic number.

It is an amenable number.

940596581 is a deficient number, since it is larger than the sum of its proper divisors (65191).

940596581 is a wasteful number, since it uses less digits than its factorization.

940596581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65190.

The product of its (nonzero) digits is 388800, while the sum is 47.

The square root of 940596581 is about 30669.1470536759. The cubic root of 940596581 is about 979.7932998047.

The spelling of 940596581 in words is "nine hundred forty million, five hundred ninety-six thousand, five hundred eighty-one".