30778093 has 2 divisors, whose sum is σ = 30778094. Its totient is φ = 30778092.

The previous prime is 30778087. The next prime is 30778103. The reversal of 30778093 is 39087703.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 28015849 + 2762244 = 5293^2 + 1662^2 .

It is an emirp because it is prime and its reverse (39087703) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 30778093 - 2⁹ = 30777581 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (30778793) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15389046 + 15389047.

It is an arithmetic number, because the mean of its divisors is an integer number (15389047).

Almost surely, 2^30778093 is an apocalyptic number.

It is an amenable number.

30778093 is a deficient number, since it is larger than the sum of its proper divisors (1).

30778093 is an equidigital number, since it uses as much as digits as its factorization.

30778093 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 31752, while the sum is 37.

The square root of 30778093 is about 5547.8007354266. The cubic root of 30778093 is about 313.3867057364.

It can be divided in two parts, 307 and 78093, that added together give a square (78400 = 280²).

The spelling of 30778093 in words is "thirty million, seven hundred seventy-eight thousand, ninety-three".