1161228637 has 2 divisors, whose sum is σ = 1161228638. Its totient is φ = 1161228636.

The previous prime is 1161228589. The next prime is 1161228667. The reversal of 1161228637 is 7368221611.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 815045401 + 346183236 = 28549^2 + 18606^2 .

It is a cyclic number.

It is not a de Polignac number, because 1161228637 - 2¹¹ = 1161226589 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1161228596 and 1161228605.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1161228667) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 580614318 + 580614319.

It is an arithmetic number, because the mean of its divisors is an integer number (580614319).

Almost surely, 2^1161228637 is an apocalyptic number.

It is an amenable number.

1161228637 is a deficient number, since it is larger than the sum of its proper divisors (1).

1161228637 is an equidigital number, since it uses as much as digits as its factorization.

1161228637 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 24192, while the sum is 37.

The square root of 1161228637 is about 34076.8049705368. The cubic root of 1161228637 is about 1051.0884063888.

The spelling of 1161228637 in words is "one billion, one hundred sixty-one million, two hundred twenty-eight thousand, six hundred thirty-seven".