30730723 has 4 divisors (see below), whose sum is σ = 30900688. Its totient is φ = 30560760.

The previous prime is 30730669. The next prime is 30730727. The reversal of 30730723 is 32703703.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 32703703 = 53 ⋅617051.

It is a cyclic number.

It is not a de Polignac number, because 30730723 - 2⁹ = 30730211 is a prime.

It is a super-2 number, since 2×30730723² = 1888754672205458, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (30730727) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 84711 + ... + 85072.

It is an arithmetic number, because the mean of its divisors is an integer number (7725172).

Almost surely, 2^30730723 is an apocalyptic number.

30730723 is a deficient number, since it is larger than the sum of its proper divisors (169965).

30730723 is a wasteful number, since it uses less digits than its factorization.

30730723 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 169964.

The product of its (nonzero) digits is 2646, while the sum is 25.

The square root of 30730723 is about 5543.5298321557. The cubic root of 30730723 is about 313.2258472677.

The spelling of 30730723 in words is "thirty million, seven hundred thirty thousand, seven hundred twenty-three".