814073721 has 16 divisors (see below), whose sum is σ = 1112700864. Its totient is φ = 529127424.

The previous prime is 814073669. The next prime is 814073759. The reversal of 814073721 is 127370418.

It is a happy number.

814073721 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 814073721 - 2⁶ = 814073657 is a prime.

It is not an unprimeable number, because it can be changed into a prime (814073321) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 68965 + ... + 79901.

It is an arithmetic number, because the mean of its divisors is an integer number (69543804).

Almost surely, 2^814073721 is an apocalyptic number.

It is an amenable number.

814073721 is a deficient number, since it is larger than the sum of its proper divisors (298627143).

814073721 is a wasteful number, since it uses less digits than its factorization.

814073721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11560.

The product of its (nonzero) digits is 9408, while the sum is 33.

The square root of 814073721 is about 28531.9771659799. The cubic root of 814073721 is about 933.7298551412.

The spelling of 814073721 in words is "eight hundred fourteen million, seventy-three thousand, seven hundred twenty-one".