187213892 has 6 divisors (see below), whose sum is σ = 327624318. Its totient is φ = 93606944.

The previous prime is 187213891. The next prime is 187213907. The reversal of 187213892 is 298312781.

It can be written as a sum of positive squares in only one way, i.e., 135862336 + 51351556 = 11656^2 + 7166^2 .

It is not an unprimeable number, because it can be changed into a prime (187213891) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23401733 + ... + 23401740.

It is an arithmetic number, because the mean of its divisors is an integer number (54604053).

Almost surely, 2^187213892 is an apocalyptic number.

It is an amenable number.

187213892 is a deficient number, since it is larger than the sum of its proper divisors (140410426).

187213892 is a wasteful number, since it uses less digits than its factorization.

187213892 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46803477 (or 46803475 counting only the distinct ones).

The product of its digits is 48384, while the sum is 41.

The square root of 187213892 is about 13682.6127621884. The cubic root of 187213892 is about 572.0658513848.

The spelling of 187213892 in words is "one hundred eighty-seven million, two hundred thirteen thousand, eight hundred ninety-two".