30137813 has 4 divisors (see below), whose sum is σ = 30149100. Its totient is φ = 30126528.

The previous prime is 30137791. The next prime is 30137837. The reversal of 30137813 is 31873103.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 11276164 + 18861649 = 3358^2 + 4343^2 .

It is a cyclic number.

It is not a de Polignac number, because 30137813 - 2⁸ = 30137557 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 (30137893) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 863 + ... + 7811.

It is an arithmetic number, because the mean of its divisors is an integer number (7537275).

Almost surely, 2^30137813 is an apocalyptic number.

It is an amenable number.

30137813 is a deficient number, since it is larger than the sum of its proper divisors (11287).

30137813 is an equidigital number, since it uses as much as digits as its factorization.

30137813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11286.

The product of its (nonzero) digits is 1512, while the sum is 26.

The square root of 30137813 is about 5489.7917082527. The cubic root of 30137813 is about 311.1983205864.

The spelling of 30137813 in words is "thirty million, one hundred thirty-seven thousand, eight hundred thirteen".