30986399 has 2 divisors, whose sum is σ = 30986400. Its totient is φ = 30986398.

The previous prime is 30986381. The next prime is 30986401. The reversal of 30986399 is 99368903.

It is a strong prime.

It is an emirp because it is prime and its reverse (99368903) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 30986399 - 2²⁴ = 14209183 is a prime.

Together with 30986401, 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 (30986339) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15493199 + 15493200.

It is an arithmetic number, because the mean of its divisors is an integer number (15493200).

Almost surely, 2^30986399 is an apocalyptic number.

30986399 is a deficient number, since it is larger than the sum of its proper divisors (1).

30986399 is an equidigital number, since it uses as much as digits as its factorization.

30986399 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 314928, while the sum is 47.

The square root of 30986399 is about 5566.5428229737. The cubic root of 30986399 is about 314.0921166710.

The spelling of 30986399 in words is "thirty million, nine hundred eighty-six thousand, three hundred ninety-nine".