29920191 has 8 divisors (see below), whose sum is σ = 45592704. Its totient is φ = 17097240.

The previous prime is 29920183. The next prime is 29920207. The reversal of 29920191 is 19102992.

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

It is not a de Polignac number, because 29920191 - 2³ = 29920183 is a prime.

It is a super-3 number, since 3×29920191³ (a number of 23 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (29920151) 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, 712365 + ... + 712406.

It is an arithmetic number, because the mean of its divisors is an integer number (5699088).

Almost surely, 2^29920191 is an apocalyptic number.

29920191 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

29920191 is a deficient number, since it is larger than the sum of its proper divisors (15672513).

29920191 is a wasteful number, since it uses less digits than its factorization.

29920191 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1424781.

The product of its (nonzero) digits is 2916, while the sum is 33.

The square root of 29920191 is about 5469.9351915722. The cubic root of 29920191 is about 310.4474668736.

The spelling of 29920191 in words is "twenty-nine million, nine hundred twenty thousand, one hundred ninety-one".