1161633401 has 2 divisors, whose sum is σ = 1161633402. Its totient is φ = 1161633400.

The previous prime is 1161633397. The next prime is 1161633427. The reversal of 1161633401 is 1043361611.

It is an a-pointer prime, because the next prime (1161633427) can be obtained adding 1161633401 to its sum of digits (26).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 589275625 + 572357776 = 24275^2 + 23924^2 .

It is a cyclic number.

It is not a de Polignac number, because 1161633401 - 2² = 1161633397 is a prime.

It is not a weakly prime, because it can be changed into another prime (1161633481) 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, 580816700 + 580816701.

It is an arithmetic number, because the mean of its divisors is an integer number (580816701).

Almost surely, 2^1161633401 is an apocalyptic number.

It is an amenable number.

1161633401 is a deficient number, since it is larger than the sum of its proper divisors (1).

1161633401 is an equidigital number, since it uses as much as digits as its factorization.

1161633401 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1296, while the sum is 26.

The square root of 1161633401 is about 34082.7434488481. The cubic root of 1161633401 is about 1051.2105165149.

The spelling of 1161633401 in words is "one billion, one hundred sixty-one million, six hundred thirty-three thousand, four hundred one".