30870085 has 4 divisors (see below), whose sum is σ = 37044108. Its totient is φ = 24696064.

The previous prime is 30870061. The next prime is 30870109. The reversal of 30870085 is 58007803.

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

It is an interprime number because it is at equal distance from previous prime (30870061) and next prime (30870109).

It can be written as a sum of positive squares in 2 ways, for example, as 5134756 + 25735329 = 2266^2 + 5073^2 .

It is a cyclic number.

It is not a de Polignac number, because 30870085 - 2¹³ = 30861893 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3087004 + ... + 3087013.

It is an arithmetic number, because the mean of its divisors is an integer number (9261027).

Almost surely, 2^30870085 is an apocalyptic number.

It is an amenable number.

30870085 is a deficient number, since it is larger than the sum of its proper divisors (6174023).

30870085 is an equidigital number, since it uses as much as digits as its factorization.

30870085 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6174022.

The product of its (nonzero) digits is 6720, while the sum is 31.

The square root of 30870085 is about 5556.0854025114. The cubic root of 30870085 is about 313.6986201797.

Adding to 30870085 its reverse (58007803), we get a palindrome (88877888).

The spelling of 30870085 in words is "thirty million, eight hundred seventy thousand, eighty-five".