187993172307 has 16 divisors (see below), whose sum is σ = 261041220000. Its totient is φ = 120194962944.

The previous prime is 187993172303. The next prime is 187993172333. The reversal of 187993172307 is 703271399781.

It is a happy number.

It is not a de Polignac number, because 187993172307 - 2² = 187993172303 is a prime.

It is a super-4 number, since 4×187993172307⁴ (a number of 46 digits) contains 4444 as substring.

It is not an unprimeable number, because it can be changed into a prime (187993172303) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7238182 + ... + 7264107.

It is an arithmetic number, because the mean of its divisors is an integer number (16315076250).

Almost surely, 2^187993172307 is an apocalyptic number.

187993172307 is a deficient number, since it is larger than the sum of its proper divisors (73048047693).

187993172307 is a wasteful number, since it uses less digits than its factorization.

187993172307 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14502470.

The product of its (nonzero) digits is 4000752, while the sum is 57.

The spelling of 187993172307 in words is "one hundred eighty-seven billion, nine hundred ninety-three million, one hundred seventy-two thousand, three hundred seven".