161097263 has 4 divisors (see below), whose sum is σ = 164136888. Its totient is φ = 158057640.

The previous prime is 161097239. The next prime is 161097281. The reversal of 161097263 is 362790161.

161097263 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 362790161 = 19 ⋅19094219.

It is a cyclic number.

It is not a de Polignac number, because 161097263 - 2¹⁰ = 161096239 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161097463) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1519733 + ... + 1519838.

It is an arithmetic number, because the mean of its divisors is an integer number (41034222).

Almost surely, 2^161097263 is an apocalyptic number.

161097263 is a deficient number, since it is larger than the sum of its proper divisors (3039625).

161097263 is an equidigital number, since it uses as much as digits as its factorization.

161097263 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3039624.

The product of its (nonzero) digits is 13608, while the sum is 35.

The square root of 161097263 is about 12692.4096608958. The cubic root of 161097263 is about 544.1217096748.

The spelling of 161097263 in words is "one hundred sixty-one million, ninety-seven thousand, two hundred sixty-three".