1187278583 has 2 divisors, whose sum is σ = 1187278584. Its totient is φ = 1187278582.

The previous prime is 1187278571. The next prime is 1187278591. The reversal of 1187278583 is 3858727811.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1187278583 - 2⁴ = 1187278567 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1187278553) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 593639291 + 593639292.

It is an arithmetic number, because the mean of its divisors is an integer number (593639292).

Almost surely, 2^1187278583 is an apocalyptic number.

1187278583 is a deficient number, since it is larger than the sum of its proper divisors (1).

1187278583 is an equidigital number, since it uses as much as digits as its factorization.

1187278583 is an evil number, because the sum of its binary digits is even.

The product of its digits is 752640, while the sum is 50.

The square root of 1187278583 is about 34456.9090749591. The cubic root of 1187278583 is about 1058.8900755972.

The spelling of 1187278583 in words is "one billion, one hundred eighty-seven million, two hundred seventy-eight thousand, five hundred eighty-three".