30361809 has 4 divisors (see below), whose sum is σ = 40482416. Its totient is φ = 20241204.

The previous prime is 30361777. The next prime is 30361823. The reversal of 30361809 is 90816303.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 30361809 - 2⁵ = 30361777 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (30361889) 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 3 ways as a sum of consecutive naturals, for example, 5060299 + ... + 5060304.

It is an arithmetic number, because the mean of its divisors is an integer number (10120604).

Almost surely, 2^30361809 is an apocalyptic number.

It is an amenable number.

30361809 is a deficient number, since it is larger than the sum of its proper divisors (10120607).

30361809 is a wasteful number, since it uses less digits than its factorization.

30361809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10120606.

The product of its (nonzero) digits is 3888, while the sum is 30.

The square root of 30361809 is about 5510.1550794873. The cubic root of 30361809 is about 311.9674008511.

The spelling of 30361809 in words is "thirty million, three hundred sixty-one thousand, eight hundred nine".