30839999 has 2 divisors, whose sum is σ = 30840000. Its totient is φ = 30839998.

The previous prime is 30839969. The next prime is 30840041. The reversal of 30839999 is 99993803.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 30839999 - 2¹⁶ = 30774463 is a prime.

It is a super-2 number, since 2×30839999² = 1902211076640002, which contains 22 as substring.

It is a Chen prime.

30839999 is a modest number, since divided by 9999 gives 3083 as remainder.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (30839909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15419999 + 15420000.

It is an arithmetic number, because the mean of its divisors is an integer number (15420000).

Almost surely, 2^30839999 is an apocalyptic number.

30839999 is a deficient number, since it is larger than the sum of its proper divisors (1).

30839999 is an equidigital number, since it uses as much as digits as its factorization.

30839999 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 472392, while the sum is 50.

The square root of 30839999 is about 5553.3772607306. The cubic root of 30839999 is about 313.5966767780.

The spelling of 30839999 in words is "thirty million, eight hundred thirty-nine thousand, nine hundred ninety-nine".