435906161 has 4 divisors (see below), whose sum is σ = 437526900. Its totient is φ = 434285424.

The previous prime is 435906131. The next prime is 435906169. The reversal of 435906161 is 161609534.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 161609534 = 2 ⋅80804767.

It can be written as a sum of positive squares in 2 ways, for example, as 244609600 + 191296561 = 15640^2 + 13831^2 .

It is a cyclic number.

It is not a de Polignac number, because 435906161 - 2¹⁰ = 435905137 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (435906169) 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, 809966 + ... + 810503.

It is an arithmetic number, because the mean of its divisors is an integer number (109381725).

Almost surely, 2^435906161 is an apocalyptic number.

It is an amenable number.

435906161 is a deficient number, since it is larger than the sum of its proper divisors (1620739).

435906161 is a wasteful number, since it uses less digits than its factorization.

435906161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1620738.

The product of its (nonzero) digits is 19440, while the sum is 35.

The square root of 435906161 is about 20878.3658603828. The cubic root of 435906161 is about 758.2242480882.

The spelling of 435906161 in words is "four hundred thirty-five million, nine hundred six thousand, one hundred sixty-one".