1161613421 has 2 divisors, whose sum is σ = 1161613422. Its totient is φ = 1161613420.

The previous prime is 1161613391. The next prime is 1161613433. The reversal of 1161613421 is 1243161611.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1107957796 + 53655625 = 33286^2 + 7325^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1161613421 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1161613441) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 580806710 + 580806711.

It is an arithmetic number, because the mean of its divisors is an integer number (580806711).

Almost surely, 2^1161613421 is an apocalyptic number.

It is an amenable number.

1161613421 is a deficient number, since it is larger than the sum of its proper divisors (1).

1161613421 is an equidigital number, since it uses as much as digits as its factorization.

1161613421 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 864, while the sum is 26.

The square root of 1161613421 is about 34082.4503373804. The cubic root of 1161613421 is about 1051.2044895685.

The spelling of 1161613421 in words is "one billion, one hundred sixty-one million, six hundred thirteen thousand, four hundred twenty-one".