187468661 has 2 divisors, whose sum is σ = 187468662. Its totient is φ = 187468660.

The previous prime is 187468657. The next prime is 187468667. The reversal of 187468661 is 166864781.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 102718225 + 84750436 = 10135^2 + 9206^2 .

It is a cyclic number.

It is not a de Polignac number, because 187468661 - 2² = 187468657 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (187468667) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 93734330 + 93734331.

It is an arithmetic number, because the mean of its divisors is an integer number (93734331).

Almost surely, 2^187468661 is an apocalyptic number.

It is an amenable number.

187468661 is a deficient number, since it is larger than the sum of its proper divisors (1).

187468661 is an equidigital number, since it uses as much as digits as its factorization.

187468661 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 387072, while the sum is 47.

The square root of 187468661 is about 13691.9195513266. The cubic root of 187468661 is about 572.3252313224.

The spelling of 187468661 in words is "one hundred eighty-seven million, four hundred sixty-eight thousand, six hundred sixty-one".