731041661 has 8 divisors (see below), whose sum is σ = 837464064. Its totient is φ = 625116240.

The previous prime is 731041643. The next prime is 731041679. The reversal of 731041661 is 166140137.

It is an interprime number because it is at equal distance from previous prime (731041643) and next prime (731041679).

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

It is a de Polignac number, because none of the positive numbers 2^k-731041661 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (731041621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 121085 + ... + 126978.

It is an arithmetic number, because the mean of its divisors is an integer number (104683008).

Almost surely, 2^731041661 is an apocalyptic number.

It is an amenable number.

731041661 is a deficient number, since it is larger than the sum of its proper divisors (106422403).

731041661 is a wasteful number, since it uses less digits than its factorization.

731041661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 248491.

The product of its (nonzero) digits is 3024, while the sum is 29.

The square root of 731041661 is about 27037.7821020882. The cubic root of 731041661 is about 900.8394065759.

Adding to 731041661 its reverse (166140137), we get a palindrome (897181798).

The spelling of 731041661 in words is "seven hundred thirty-one million, forty-one thousand, six hundred sixty-one".