161616097 has 2 divisors, whose sum is σ = 161616098. Its totient is φ = 161616096.

The previous prime is 161616031. The next prime is 161616107. The reversal of 161616097 is 790616161.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 102495376 + 59120721 = 10124^2 + 7689^2 .

It is a cyclic number.

It is not a de Polignac number, because 161616097 - 2¹⁹ = 161091809 is a prime.

It is a super-2 number, since 2×161616097² = 52239525619026818, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (161616997) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80808048 + 80808049.

It is an arithmetic number, because the mean of its divisors is an integer number (80808049).

Almost surely, 2^161616097 is an apocalyptic number.

It is an amenable number.

161616097 is a deficient number, since it is larger than the sum of its proper divisors (1).

161616097 is an equidigital number, since it uses as much as digits as its factorization.

161616097 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13608, while the sum is 37.

The square root of 161616097 is about 12712.8319818992. The cubic root of 161616097 is about 544.7052211688.

The spelling of 161616097 in words is "one hundred sixty-one million, six hundred sixteen thousand, ninety-seven".