1187842673 has 2 divisors, whose sum is σ = 1187842674. Its totient is φ = 1187842672.

The previous prime is 1187842637. The next prime is 1187842687. The reversal of 1187842673 is 3762487811.

It is a happy number.

Together with previous prime (1187842637) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 714867169 + 472975504 = 26737^2 + 21748^2 .

It is a cyclic number.

It is not a de Polignac number, because 1187842673 - 2¹² = 1187838577 is a prime.

It is not a weakly prime, because it can be changed into another prime (1187842633) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 593921336 + 593921337.

It is an arithmetic number, because the mean of its divisors is an integer number (593921337).

Almost surely, 2^1187842673 is an apocalyptic number.

It is an amenable number.

1187842673 is a deficient number, since it is larger than the sum of its proper divisors (1).

1187842673 is an equidigital number, since it uses as much as digits as its factorization.

1187842673 is an evil number, because the sum of its binary digits is even.

The product of its digits is 451584, while the sum is 47.

The square root of 1187842673 is about 34465.0935440483. The cubic root of 1187842673 is about 1059.0577460833.

The spelling of 1187842673 in words is "one billion, one hundred eighty-seven million, eight hundred forty-two thousand, six hundred seventy-three".