723972881 has 8 divisors (see below), whose sum is σ = 727551720. Its totient is φ = 720401152.

The previous prime is 723972869. The next prime is 723972883. The reversal of 723972881 is 188279327.

723972881 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 11937025 + 712035856 = 3455^2 + 26684^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 723972881 - 2¹⁸ = 723710737 is a prime.

It is a super-2 number, since 2×723972881² = 1048273464846880322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (723972883) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 416891 + ... + 418623.

It is an arithmetic number, because the mean of its divisors is an integer number (90943965).

Almost surely, 2^723972881 is an apocalyptic number.

It is an amenable number.

723972881 is a deficient number, since it is larger than the sum of its proper divisors (3578839).

723972881 is a wasteful number, since it uses less digits than its factorization.

723972881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3555.

The product of its digits is 338688, while the sum is 47.

The square root of 723972881 is about 26906.7441545795. The cubic root of 723972881 is about 897.9264530881.

The spelling of 723972881 in words is "seven hundred twenty-three million, nine hundred seventy-two thousand, eight hundred eighty-one".