1187603213 has 2 divisors, whose sum is σ = 1187603214. Its totient is φ = 1187603212.

The previous prime is 1187603203. The next prime is 1187603231. The reversal of 1187603213 is 3123067811.

Together with next prime (1187603231) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 972628969 + 214974244 = 31187^2 + 14662^2 .

It is a cyclic number.

It is not a de Polignac number, because 1187603213 - 2²² = 1183408909 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1187603213.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1187603203) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 593801606 + 593801607.

It is an arithmetic number, because the mean of its divisors is an integer number (593801607).

Almost surely, 2^1187603213 is an apocalyptic number.

It is an amenable number.

1187603213 is a deficient number, since it is larger than the sum of its proper divisors (1).

1187603213 is an equidigital number, since it uses as much as digits as its factorization.

1187603213 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 32.

The square root of 1187603213 is about 34461.6194192902. The cubic root of 1187603213 is about 1058.9865753194.

The spelling of 1187603213 in words is "one billion, one hundred eighty-seven million, six hundred three thousand, two hundred thirteen".