187794945 has 24 divisors (see below), whose sum is σ = 350551656. Its totient is φ = 92452608.

The previous prime is 187794913. The next prime is 187794947. The reversal of 187794945 is 549497781.

187794945 is a `hidden beast` number, since 1 + 87 + 79 + 494 + 5 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 19210689 + 168584256 = 4383^2 + 12984^2 .

It is not a de Polignac number, because 187794945 - 2⁵ = 187794913 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 187794891 and 187794900.

It is not an unprimeable number, because it can be changed into a prime (187794947) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 159924 + ... + 161093.

It is an arithmetic number, because the mean of its divisors is an integer number (14606319).

Almost surely, 2^187794945 is an apocalyptic number.

187794945 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

187794945 is a deficient number, since it is larger than the sum of its proper divisors (162756711).

187794945 is a wasteful number, since it uses less digits than its factorization.

187794945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 321041 (or 321038 counting only the distinct ones).

The product of its digits is 2540160, while the sum is 54.

The square root of 187794945 is about 13703.8295742468. The cubic root of 187794945 is about 572.6570775992.

The spelling of 187794945 in words is "one hundred eighty-seven million, seven hundred ninety-four thousand, nine hundred forty-five".