30137893 has 2 divisors, whose sum is σ = 30137894. Its totient is φ = 30137892.

The previous prime is 30137839. The next prime is 30137927. The reversal of 30137893 is 39873103.

Together with previous prime (30137839) it forms an Ormiston pair, because they use the same digits, order apart.

It is an a-pointer prime, because the next prime (30137927) can be obtained adding 30137893 to its sum of digits (34).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 28227969 + 1909924 = 5313^2 + 1382^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-30137893 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (30137593) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15068946 + 15068947.

It is an arithmetic number, because the mean of its divisors is an integer number (15068947).

Almost surely, 2^30137893 is an apocalyptic number.

It is an amenable number.

30137893 is a deficient number, since it is larger than the sum of its proper divisors (1).

30137893 is an equidigital number, since it uses as much as digits as its factorization.

30137893 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13608, while the sum is 34.

The square root of 30137893 is about 5489.7989944988. The cubic root of 30137893 is about 311.1985959420.

The spelling of 30137893 in words is "thirty million, one hundred thirty-seven thousand, eight hundred ninety-three".