161480009 has 2 divisors, whose sum is σ = 161480010. Its totient is φ = 161480008.

The previous prime is 161479999. The next prime is 161480021. The reversal of 161480009 is 900084161.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 155550784 + 5929225 = 12472^2 + 2435^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-161480009 is a prime.

It is not a weakly prime, because it can be changed into another prime (161470009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80740004 + 80740005.

It is an arithmetic number, because the mean of its divisors is an integer number (80740005).

Almost surely, 2^161480009 is an apocalyptic number.

It is an amenable number.

161480009 is a deficient number, since it is larger than the sum of its proper divisors (1).

161480009 is an equidigital number, since it uses as much as digits as its factorization.

161480009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1728, while the sum is 29.

The square root of 161480009 is about 12707.4784674222. The cubic root of 161480009 is about 544.5522894960.

The spelling of 161480009 in words is "one hundred sixty-one million, four hundred eighty thousand, nine".