30899705 has 4 divisors (see below), whose sum is σ = 37079652. Its totient is φ = 24719760.

The previous prime is 30899677. The next prime is 30899711. The reversal of 30899705 is 50799803.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 4108729 + 26790976 = 2027^2 + 5176^2 .

It is not a de Polignac number, because 30899705 - 2¹² = 30895609 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3089966 + ... + 3089975.

It is an arithmetic number, because the mean of its divisors is an integer number (9269913).

Almost surely, 2^30899705 is an apocalyptic number.

It is an amenable number.

30899705 is a deficient number, since it is larger than the sum of its proper divisors (6179947).

30899705 is an equidigital number, since it uses as much as digits as its factorization.

30899705 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6179946.

The product of its (nonzero) digits is 68040, while the sum is 41.

The square root of 30899705 is about 5558.7503091972. The cubic root of 30899705 is about 313.7989199023.

The spelling of 30899705 in words is "thirty million, eight hundred ninety-nine thousand, seven hundred five".