30873749 has 2 divisors, whose sum is σ = 30873750. Its totient is φ = 30873748.

The previous prime is 30873721. The next prime is 30873757. The reversal of 30873749 is 94737803.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 22259524 + 8614225 = 4718^2 + 2935^2 .

It is an emirp because it is prime and its reverse (94737803) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 30873749 - 2¹² = 30869653 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (30873769) 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 as a sum of consecutive naturals, namely, 15436874 + 15436875.

It is an arithmetic number, because the mean of its divisors is an integer number (15436875).

Almost surely, 2^30873749 is an apocalyptic number.

It is an amenable number.

30873749 is a deficient number, since it is larger than the sum of its proper divisors (1).

30873749 is an equidigital number, since it uses as much as digits as its factorization.

30873749 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 127008, while the sum is 41.

The square root of 30873749 is about 5556.4151212810. The cubic root of 30873749 is about 313.7110307521.

The spelling of 30873749 in words is "thirty million, eight hundred seventy-three thousand, seven hundred forty-nine".