30690137 has 8 divisors (see below), whose sum is σ = 31549320. Its totient is φ = 29842560.

The previous prime is 30690109. The next prime is 30690139. The reversal of 30690137 is 73109603.

It can be written as a sum of positive squares in 4 ways, for example, as 175561 + 30514576 = 419^2 + 5524^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 30690137 - 2⁸ = 30689881 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (30690139) 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 in 7 ways as a sum of consecutive naturals, for example, 2603 + ... + 8255.

It is an arithmetic number, because the mean of its divisors is an integer number (3943665).

Almost surely, 2^30690137 is an apocalyptic number.

It is an amenable number.

30690137 is a deficient number, since it is larger than the sum of its proper divisors (859183).

30690137 is an equidigital number, since it uses as much as digits as its factorization.

30690137 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5803.

The product of its (nonzero) digits is 3402, while the sum is 29.

The square root of 30690137 is about 5539.8679587153. The cubic root of 30690137 is about 313.0878942834.

The spelling of 30690137 in words is "thirty million, six hundred ninety thousand, one hundred thirty-seven".