30990207 has 4 divisors (see below), whose sum is σ = 41320280. Its totient is φ = 20660136.

The previous prime is 30990191. The next prime is 30990209. The reversal of 30990207 is 70209903.

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

It is not a de Polignac number, because 30990207 - 2⁴ = 30990191 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30990209) by changing a digit.

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, 5165032 + ... + 5165037.

It is an arithmetic number, because the mean of its divisors is an integer number (10330070).

Almost surely, 2^30990207 is an apocalyptic number.

30990207 is a deficient number, since it is larger than the sum of its proper divisors (10330073).

30990207 is a wasteful number, since it uses less digits than its factorization.

30990207 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10330072.

The product of its (nonzero) digits is 3402, while the sum is 30.

The square root of 30990207 is about 5566.8848560034. The cubic root of 30990207 is about 314.1049826792.

The spelling of 30990207 in words is "thirty million, nine hundred ninety thousand, two hundred seven".