30997093 has 4 divisors (see below), whose sum is σ = 31281580. Its totient is φ = 30712608.

The previous prime is 30997079. The next prime is 30997121. The reversal of 30997093 is 39079903.

It is a happy number.

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 24433249 + 6563844 = 4943^2 + 2562^2 .

It is a cyclic number.

It is not a de Polignac number, because 30997093 - 2⁵ = 30997061 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 (30997013) 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, 142080 + ... + 142297.

It is an arithmetic number, because the mean of its divisors is an integer number (7820395).

Almost surely, 2^30997093 is an apocalyptic number.

It is an amenable number.

30997093 is a deficient number, since it is larger than the sum of its proper divisors (284487).

30997093 is a wasteful number, since it uses less digits than its factorization.

30997093 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 284486.

The product of its (nonzero) digits is 45927, while the sum is 40.

The square root of 30997093 is about 5567.5033004032. The cubic root of 30997093 is about 314.1282455843.

The spelling of 30997093 in words is "thirty million, nine hundred ninety-seven thousand, ninety-three".