1187311079 has 2 divisors, whose sum is σ = 1187311080. Its totient is φ = 1187311078.

The previous prime is 1187311057. The next prime is 1187311157. The reversal of 1187311079 is 9701137811.

It is a weak prime.

It is an emirp because it is prime and its reverse (9701137811) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1187311079 is a prime.

It is a super-2 number, since 2×1187311079² = 2819415196632288482, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1187311009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 593655539 + 593655540.

It is an arithmetic number, because the mean of its divisors is an integer number (593655540).

Almost surely, 2^1187311079 is an apocalyptic number.

1187311079 is a deficient number, since it is larger than the sum of its proper divisors (1).

1187311079 is an equidigital number, since it uses as much as digits as its factorization.

1187311079 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10584, while the sum is 38.

The square root of 1187311079 is about 34457.3806172205. The cubic root of 1187311079 is about 1058.8997361712.

The spelling of 1187311079 in words is "one billion, one hundred eighty-seven million, three hundred eleven thousand, seventy-nine".