30715973 has 4 divisors (see below), whose sum is σ = 30744780. Its totient is φ = 30687168.

The previous prime is 30715961. The next prime is 30715981. The reversal of 30715973 is 37951703.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 432964 + 30283009 = 658^2 + 5503^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-30715973 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 (30715933) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12740 + ... + 14957.

It is an arithmetic number, because the mean of its divisors is an integer number (7686195).

Almost surely, 2^30715973 is an apocalyptic number.

It is an amenable number.

30715973 is a deficient number, since it is larger than the sum of its proper divisors (28807).

30715973 is a wasteful number, since it uses less digits than its factorization.

30715973 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28806.

The product of its (nonzero) digits is 19845, while the sum is 35.

The square root of 30715973 is about 5542.1992926996. The cubic root of 30715973 is about 313.1757256504.

The spelling of 30715973 in words is "thirty million, seven hundred fifteen thousand, nine hundred seventy-three".