161090477 has 4 divisors (see below), whose sum is σ = 166286976. Its totient is φ = 155893980.

The previous prime is 161090471. The next prime is 161090497. The reversal of 161090477 is 774090161.

161090477 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 a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 161090477 - 2²⁴ = 144313261 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161090471) 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, 2598203 + ... + 2598264.

It is an arithmetic number, because the mean of its divisors is an integer number (41571744).

Almost surely, 2^161090477 is an apocalyptic number.

It is an amenable number.

161090477 is a deficient number, since it is larger than the sum of its proper divisors (5196499).

161090477 is an equidigital number, since it uses as much as digits as its factorization.

161090477 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5196498.

The product of its (nonzero) digits is 10584, while the sum is 35.

The square root of 161090477 is about 12692.1423329555. The cubic root of 161090477 is about 544.1140694420.

The spelling of 161090477 in words is "one hundred sixty-one million, ninety thousand, four hundred seventy-seven".