30872773 has 4 divisors (see below), whose sum is σ = 30891820. Its totient is φ = 30853728.

The previous prime is 30872767. The next prime is 30872783. The reversal of 30872773 is 37727803.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 37727803 = 151 ⋅249853.

It can be written as a sum of positive squares in 2 ways, for example, as 14607684 + 16265089 = 3822^2 + 4033^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-30872773 is a prime.

It is a super-2 number, since 2×30872773² = 1906256225419058, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30872783) 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, 6840 + ... + 10417.

It is an arithmetic number, because the mean of its divisors is an integer number (7722955).

Almost surely, 2^30872773 is an apocalyptic number.

It is an amenable number.

30872773 is a deficient number, since it is larger than the sum of its proper divisors (19047).

30872773 is a wasteful number, since it uses less digits than its factorization.

30872773 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19046.

The product of its (nonzero) digits is 49392, while the sum is 37.

The square root of 30872773 is about 5556.3272941755. The cubic root of 30872773 is about 313.7077249750.

The spelling of 30872773 in words is "thirty million, eight hundred seventy-two thousand, seven hundred seventy-three".