161489513 has 2 divisors, whose sum is σ = 161489514. Its totient is φ = 161489512.

The previous prime is 161489507. The next prime is 161489519. The reversal of 161489513 is 315984161.

It is a balanced prime because it is at equal distance from previous prime (161489507) and next prime (161489519).

It can be written as a sum of positive squares in only one way, i.e., 127418944 + 34070569 = 11288^2 + 5837^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-161489513 is a prime.

It is not a weakly prime, because it can be changed into another prime (161489519) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80744756 + 80744757.

It is an arithmetic number, because the mean of its divisors is an integer number (80744757).

Almost surely, 2^161489513 is an apocalyptic number.

It is an amenable number.

161489513 is a deficient number, since it is larger than the sum of its proper divisors (1).

161489513 is an equidigital number, since it uses as much as digits as its factorization.

161489513 is an evil number, because the sum of its binary digits is even.

The product of its digits is 25920, while the sum is 38.

The square root of 161489513 is about 12707.8524149441. The cubic root of 161489513 is about 544.5629726005.

The spelling of 161489513 in words is "one hundred sixty-one million, four hundred eighty-nine thousand, five hundred thirteen".