161089001 has 2 divisors, whose sum is σ = 161089002. Its totient is φ = 161089000.

The previous prime is 161088953. The next prime is 161089007. The reversal of 161089001 is 100980161.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 160909225 + 179776 = 12685^2 + 424^2 .

It is a cyclic number.

It is not a de Polignac number, because 161089001 - 2²² = 156894697 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (161089007) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80544500 + 80544501.

It is an arithmetic number, because the mean of its divisors is an integer number (80544501).

Almost surely, 2^161089001 is an apocalyptic number.

It is an amenable number.

161089001 is a deficient number, since it is larger than the sum of its proper divisors (1).

161089001 is an equidigital number, since it uses as much as digits as its factorization.

161089001 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 432, while the sum is 26.

The square root of 161089001 is about 12692.0841866102. The cubic root of 161089001 is about 544.1124076123.

The spelling of 161089001 in words is "one hundred sixty-one million, eighty-nine thousand, one".