161033953 has 4 divisors (see below), whose sum is σ = 165386260. Its totient is φ = 156681648.

The previous prime is 161033947. The next prime is 161033959. The reversal of 161033953 is 359330161.

161033953 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: 359330161 = 2593 ⋅138577.

It is an interprime number because it is at equal distance from previous prime (161033947) and next prime (161033959).

It can be written as a sum of positive squares in 2 ways, for example, as 141919569 + 19114384 = 11913^2 + 4372^2 .

It is a cyclic number.

It is not a de Polignac number, because 161033953 - 2⁵ = 161033921 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (161033959) 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, 2176098 + ... + 2176171.

It is an arithmetic number, because the mean of its divisors is an integer number (41346565).

Almost surely, 2^161033953 is an apocalyptic number.

It is an amenable number.

161033953 is a deficient number, since it is larger than the sum of its proper divisors (4352307).

161033953 is an equidigital number, since it uses as much as digits as its factorization.

161033953 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4352306.

The product of its (nonzero) digits is 7290, while the sum is 31.

The square root of 161033953 is about 12689.9154055494. The cubic root of 161033953 is about 544.0504217700.

The spelling of 161033953 in words is "one hundred sixty-one million, thirty-three thousand, nine hundred fifty-three".