187323649 has 2 divisors, whose sum is σ = 187323650. Its totient is φ = 187323648.

The previous prime is 187323611. The next prime is 187323671. The reversal of 187323649 is 946323781.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 186513649 + 810000 = 13657^2 + 900^2 .

It is a cyclic number.

It is not a de Polignac number, because 187323649 - 2¹¹ = 187321601 is a prime.

It is not a weakly prime, because it can be changed into another prime (187323449) by changing a digit.

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, 93661824 + 93661825.

It is an arithmetic number, because the mean of its divisors is an integer number (93661825).

Almost surely, 2^187323649 is an apocalyptic number.

It is an amenable number.

187323649 is a deficient number, since it is larger than the sum of its proper divisors (1).

187323649 is an equidigital number, since it uses as much as digits as its factorization.

187323649 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 217728, while the sum is 43.

The square root of 187323649 is about 13686.6229947347. The cubic root of 187323649 is about 572.1776236555.

The spelling of 187323649 in words is "one hundred eighty-seven million, three hundred twenty-three thousand, six hundred forty-nine".