187272745 has 16 divisors (see below), whose sum is σ = 249180480. Its totient is φ = 133963200.

The previous prime is 187272737. The next prime is 187272779. The reversal of 187272745 is 547272781.

It is not a de Polignac number, because 187272745 - 2³ = 187272737 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24555 + ... + 31264.

It is an arithmetic number, because the mean of its divisors is an integer number (15573780).

Almost surely, 2^187272745 is an apocalyptic number.

It is an amenable number.

187272745 is a deficient number, since it is larger than the sum of its proper divisors (61907735).

187272745 is a wasteful number, since it uses less digits than its factorization.

187272745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55896.

The product of its digits is 219520, while the sum is 43.

The square root of 187272745 is about 13684.7632423802. The cubic root of 187272745 is about 572.1257904271.

The spelling of 187272745 in words is "one hundred eighty-seven million, two hundred seventy-two thousand, seven hundred forty-five".