30870149 has 4 divisors (see below), whose sum is σ = 30920640. Its totient is φ = 30819660.

The previous prime is 30870139. The next prime is 30870179. The reversal of 30870149 is 94107803.

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 a cyclic number.

It is not a de Polignac number, because 30870149 - 2¹² = 30866053 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 (30870109) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24317 + ... + 25554.

It is an arithmetic number, because the mean of its divisors is an integer number (7730160).

Almost surely, 2^30870149 is an apocalyptic number.

It is an amenable number.

30870149 is a deficient number, since it is larger than the sum of its proper divisors (50491).

30870149 is an equidigital number, since it uses as much as digits as its factorization.

30870149 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50490.

The product of its (nonzero) digits is 6048, while the sum is 32.

The square root of 30870149 is about 5556.0911619591. The cubic root of 30870149 is about 313.6988369667.

The spelling of 30870149 in words is "thirty million, eight hundred seventy thousand, one hundred forty-nine".