30311949 has 4 divisors (see below), whose sum is σ = 40415936. Its totient is φ = 20207964.

The previous prime is 30311933. The next prime is 30311971. The reversal of 30311949 is 94911303.

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 30311949 - 2⁴ = 30311933 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 (30311909) 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, 5051989 + ... + 5051994.

It is an arithmetic number, because the mean of its divisors is an integer number (10103984).

Almost surely, 2^30311949 is an apocalyptic number.

It is an amenable number.

30311949 is a deficient number, since it is larger than the sum of its proper divisors (10103987).

30311949 is a wasteful number, since it uses less digits than its factorization.

30311949 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10103986.

The product of its (nonzero) digits is 2916, while the sum is 30.

The square root of 30311949 is about 5505.6288469166. The cubic root of 30311949 is about 311.7965368885.

The spelling of 30311949 in words is "thirty million, three hundred eleven thousand, nine hundred forty-nine".