1195133861 has 2 divisors, whose sum is σ = 1195133862. Its totient is φ = 1195133860.

The previous prime is 1195133857. The next prime is 1195133869. The reversal of 1195133861 is 1683315911.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 919241761 + 275892100 = 30319^2 + 16610^2 .

It is a cyclic number.

It is not a de Polignac number, because 1195133861 - 2² = 1195133857 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1195133869) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 597566930 + 597566931.

It is an arithmetic number, because the mean of its divisors is an integer number (597566931).

Almost surely, 2^1195133861 is an apocalyptic number.

It is an amenable number.

1195133861 is a deficient number, since it is larger than the sum of its proper divisors (1).

1195133861 is an equidigital number, since it uses as much as digits as its factorization.

1195133861 is an evil number, because the sum of its binary digits is even.

The product of its digits is 19440, while the sum is 38.

The square root of 1195133861 is about 34570.7081356457. The cubic root of 1195133861 is about 1061.2202220091.

The spelling of 1195133861 in words is "one billion, one hundred ninety-five million, one hundred thirty-three thousand, eight hundred sixty-one".