30199991 has 8 divisors (see below), whose sum is σ = 31907520. Its totient is φ = 28536928.

The previous prime is 30199957. The next prime is 30199997. The reversal of 30199991 is 19999103.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 30199991 - 2⁶ = 30199927 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 (30199997) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9716 + ... + 12441.

It is an arithmetic number, because the mean of its divisors is an integer number (3988440).

Almost surely, 2^30199991 is an apocalyptic number.

30199991 is a deficient number, since it is larger than the sum of its proper divisors (1707529).

30199991 is a wasteful number, since it uses less digits than its factorization.

30199991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22233.

The product of its (nonzero) digits is 19683, while the sum is 41.

The square root of 30199991 is about 5495.4518467547. The cubic root of 30199991 is about 311.4121869950.

The spelling of 30199991 in words is "thirty million, one hundred ninety-nine thousand, nine hundred ninety-one".