191672055 has 32 divisors (see below), whose sum is σ = 341496000. Its totient is φ = 102001536.

The previous prime is 191672053. The next prime is 191672071. The reversal of 191672055 is 550276191.

It is not a de Polignac number, because 191672055 - 2¹ = 191672053 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (191672051) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 73921 + ... + 76469.

It is an arithmetic number, because the mean of its divisors is an integer number (10671750).

Almost surely, 2^191672055 is an apocalyptic number.

191672055 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

191672055 is a deficient number, since it is larger than the sum of its proper divisors (149823945).

191672055 is a wasteful number, since it uses less digits than its factorization.

191672055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3120 (or 3114 counting only the distinct ones).

The product of its (nonzero) digits is 18900, while the sum is 36.

The square root of 191672055 is about 13844.5677072273. The cubic root of 191672055 is about 576.5711836223.

The spelling of 191672055 in words is "one hundred ninety-one million, six hundred seventy-two thousand, fifty-five".