30699973 has 4 divisors (see below), whose sum is σ = 31529740. Its totient is φ = 29870208.

The previous prime is 30699971. The next prime is 30699989. The reversal of 30699973 is 37999603.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 37999603 = 151 ⋅251653.

It can be written as a sum of positive squares in 2 ways, for example, as 24780484 + 5919489 = 4978^2 + 2433^2 .

It is a cyclic number.

It is not a de Polignac number, because 30699973 - 2¹ = 30699971 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 (30699971) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 414828 + ... + 414901.

It is an arithmetic number, because the mean of its divisors is an integer number (7882435).

Almost surely, 2^30699973 is an apocalyptic number.

It is an amenable number.

30699973 is a deficient number, since it is larger than the sum of its proper divisors (829767).

30699973 is an equidigital number, since it uses as much as digits as its factorization.

30699973 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 829766.

The product of its (nonzero) digits is 275562, while the sum is 46.

The square root of 30699973 is about 5540.7556343878. The cubic root of 30699973 is about 313.1213382918.

The spelling of 30699973 in words is "thirty million, six hundred ninety-nine thousand, nine hundred seventy-three".