30949161 has 4 divisors (see below), whose sum is σ = 41265552. Its totient is φ = 20632772.

The previous prime is 30949159. The next prime is 30949169. The reversal of 30949161 is 16194903.

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, and also an emirpimes, since its reverse is a distinct semiprime: 16194903 = 3 ⋅5398301.

It is a cyclic number.

It is not a de Polignac number, because 30949161 - 2¹ = 30949159 is a prime.

It is not an unprimeable number, because it can be changed into a prime (30949169) 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, 5158191 + ... + 5158196.

It is an arithmetic number, because the mean of its divisors is an integer number (10316388).

Almost surely, 2^30949161 is an apocalyptic number.

It is an amenable number.

30949161 is a deficient number, since it is larger than the sum of its proper divisors (10316391).

30949161 is a wasteful number, since it uses less digits than its factorization.

30949161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10316390.

The product of its (nonzero) digits is 5832, while the sum is 33.

The square root of 30949161 is about 5563.1970125100. The cubic root of 30949161 is about 313.9662458476.

The spelling of 30949161 in words is "thirty million, nine hundred forty-nine thousand, one hundred sixty-one".