30139799 has 2 divisors, whose sum is σ = 30139800. Its totient is φ = 30139798.

The previous prime is 30139777. The next prime is 30139801. The reversal of 30139799 is 99793103.

It is a strong prime.

It is an emirp because it is prime and its reverse (99793103) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 30139799 - 2¹⁶ = 30074263 is a prime.

It is a Sophie Germain prime.

Together with 30139801, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (30139199) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15069899 + 15069900.

It is an arithmetic number, because the mean of its divisors is an integer number (15069900).

Almost surely, 2^30139799 is an apocalyptic number.

30139799 is a deficient number, since it is larger than the sum of its proper divisors (1).

30139799 is an equidigital number, since it uses as much as digits as its factorization.

30139799 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 45927, while the sum is 41.

The square root of 30139799 is about 5489.9725864525. The cubic root of 30139799 is about 311.2051561443.

The spelling of 30139799 in words is "thirty million, one hundred thirty-nine thousand, seven hundred ninety-nine".