1161185951 has 2 divisors, whose sum is σ = 1161185952. Its totient is φ = 1161185950.

The previous prime is 1161185947. The next prime is 1161186001. The reversal of 1161185951 is 1595811611.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (1595811611) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1161185951 - 2² = 1161185947 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1161185251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 580592975 + 580592976.

It is an arithmetic number, because the mean of its divisors is an integer number (580592976).

Almost surely, 2^1161185951 is an apocalyptic number.

1161185951 is a deficient number, since it is larger than the sum of its proper divisors (1).

1161185951 is an equidigital number, since it uses as much as digits as its factorization.

1161185951 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10800, while the sum is 38.

The square root of 1161185951 is about 34076.1786443257. The cubic root of 1161185951 is about 1051.0755271251.

The spelling of 1161185951 in words is "one billion, one hundred sixty-one million, one hundred eighty-five thousand, nine hundred fifty-one".