30001949 has 4 divisors (see below), whose sum is σ = 30299100. Its totient is φ = 29704800.

The previous prime is 30001919. The next prime is 30001981. The reversal of 30001949 is 94910003.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 23716900 + 6285049 = 4870^2 + 2507^2 .

It is a cyclic number.

It is not a de Polignac number, because 30001949 - 2⁸ = 30001693 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 (30001919) 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, 148424 + ... + 148625.

It is an arithmetic number, because the mean of its divisors is an integer number (7574775).

Almost surely, 2^30001949 is an apocalyptic number.

It is an amenable number.

30001949 is a deficient number, since it is larger than the sum of its proper divisors (297151).

30001949 is a wasteful number, since it uses less digits than its factorization.

30001949 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 297150.

The product of its (nonzero) digits is 972, while the sum is 26.

The square root of 30001949 is about 5477.4034907062. The cubic root of 30001949 is about 310.7299793343.

The spelling of 30001949 in words is "thirty million, one thousand, nine hundred forty-nine".