30873731 has 8 divisors (see below), whose sum is σ = 35453184. Its totient is φ = 26336520.

The previous prime is 30873721. The next prime is 30873749. The reversal of 30873731 is 13737803.

It is a happy number.

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

It is not a de Polignac number, because 30873731 - 2¹⁰ = 30872707 is a prime.

It is a super-2 number, since 2×30873731² = 1906374531720722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (30873701) 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, 8975 + ... + 11928.

It is an arithmetic number, because the mean of its divisors is an integer number (4431648).

Almost surely, 2^30873731 is an apocalyptic number.

30873731 is a deficient number, since it is larger than the sum of its proper divisors (4579453).

30873731 is a wasteful number, since it uses less digits than its factorization.

30873731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21121.

The product of its (nonzero) digits is 10584, while the sum is 32.

The square root of 30873731 is about 5556.4135015314. The cubic root of 30873731 is about 313.7109697855.

The spelling of 30873731 in words is "thirty million, eight hundred seventy-three thousand, seven hundred thirty-one".