30999739 has 2 divisors, whose sum is σ = 30999740. Its totient is φ = 30999738.

The previous prime is 30999737. The next prime is 30999751. The reversal of 30999739 is 93799903.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 30999739 - 2¹ = 30999737 is a prime.

Together with 30999737, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 30999692 and 30999701.

It is not a weakly prime, because it can be changed into another prime (30999733) 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, 15499869 + 15499870.

It is an arithmetic number, because the mean of its divisors is an integer number (15499870).

Almost surely, 2^30999739 is an apocalyptic number.

30999739 is a deficient number, since it is larger than the sum of its proper divisors (1).

30999739 is an equidigital number, since it uses as much as digits as its factorization.

30999739 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 413343, while the sum is 49.

The square root of 30999739 is about 5567.7409242888. The cubic root of 30999739 is about 314.1371836234.

The spelling of 30999739 in words is "thirty million, nine hundred ninety-nine thousand, seven hundred thirty-nine".