1187120197 has 2 divisors, whose sum is σ = 1187120198. Its totient is φ = 1187120196.

The previous prime is 1187120159. The next prime is 1187120203. The reversal of 1187120197 is 7910217811.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 871489441 + 315630756 = 29521^2 + 17766^2 .

It is a cyclic number.

It is not a de Polignac number, because 1187120197 - 2⁷ = 1187120069 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1187120117) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 593560098 + 593560099.

It is an arithmetic number, because the mean of its divisors is an integer number (593560099).

Almost surely, 2^1187120197 is an apocalyptic number.

It is an amenable number.

1187120197 is a deficient number, since it is larger than the sum of its proper divisors (1).

1187120197 is an equidigital number, since it uses as much as digits as its factorization.

1187120197 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7056, while the sum is 37.

The square root of 1187120197 is about 34454.6106783983. The cubic root of 1187120197 is about 1058.8429872883.

The spelling of 1187120197 in words is "one billion, one hundred eighty-seven million, one hundred twenty thousand, one hundred ninety-seven".