731870023 has 4 divisors (see below), whose sum is σ = 733560688. Its totient is φ = 730179360.

The previous prime is 731870021. The next prime is 731870039. The reversal of 731870023 is 320078137.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 320078137 = 1151 ⋅278087.

It is a cyclic number.

It is not a de Polignac number, because 731870023 - 2¹ = 731870021 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (731870021) 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 3 ways as a sum of consecutive naturals, for example, 844683 + ... + 845548.

It is an arithmetic number, because the mean of its divisors is an integer number (183390172).

Almost surely, 2^731870023 is an apocalyptic number.

731870023 is a deficient number, since it is larger than the sum of its proper divisors (1690665).

731870023 is a wasteful number, since it uses less digits than its factorization.

731870023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1690664.

The product of its (nonzero) digits is 7056, while the sum is 31.

The square root of 731870023 is about 27053.0963662203. The cubic root of 731870023 is about 901.1795328621.

The spelling of 731870023 in words is "seven hundred thirty-one million, eight hundred seventy thousand, twenty-three".