187971136 has 14 divisors (see below), whose sum is σ = 373005350. Its totient is φ = 93985536.

The previous prime is 187971107. The next prime is 187971143. The reversal of 187971136 is 631179781.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 111513600 + 76457536 = 10560^2 + 8744^2 .

It is a junction number, because it is equal to n+sod(n) for n = 187971092 and 187971101.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1468461 + ... + 1468588.

Almost surely, 2^187971136 is an apocalyptic number.

187971136 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

187971136 is a deficient number, since it is larger than the sum of its proper divisors (185034214).

187971136 is an equidigital number, since it uses as much as digits as its factorization.

187971136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2937061 (or 2937051 counting only the distinct ones).

The product of its digits is 63504, while the sum is 43.

The square root of 187971136 is about 13710.2565986199. The cubic root of 187971136 is about 572.8361123888.

The spelling of 187971136 in words is "one hundred eighty-seven million, nine hundred seventy-one thousand, one hundred thirty-six".