187120961 has 2 divisors, whose sum is σ = 187120962. Its totient is φ = 187120960.

The previous prime is 187120943. The next prime is 187121003. The reversal of 187120961 is 169021781.

187120961 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 182790400 + 4330561 = 13520^2 + 2081^2 .

It is a cyclic number.

It is not a de Polignac number, because 187120961 - 2¹⁸ = 186858817 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (187170961) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 93560480 + 93560481.

It is an arithmetic number, because the mean of its divisors is an integer number (93560481).

Almost surely, 2^187120961 is an apocalyptic number.

It is an amenable number.

187120961 is a deficient number, since it is larger than the sum of its proper divisors (1).

187120961 is an equidigital number, since it uses as much as digits as its factorization.

187120961 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6048, while the sum is 35.

The square root of 187120961 is about 13679.2163883755. The cubic root of 187120961 is about 571.9711799015.

The spelling of 187120961 in words is "one hundred eighty-seven million, one hundred twenty thousand, nine hundred sixty-one".