161892077 has 4 divisors (see below), whose sum is σ = 161929440. Its totient is φ = 161854716.

The previous prime is 161892053. The next prime is 161892079. The reversal of 161892077 is 770298161.

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 161892077 - 2¹⁸ = 161629933 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 (161892079) 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, 11177 + ... + 21182.

It is an arithmetic number, because the mean of its divisors is an integer number (40482360).

Almost surely, 2^161892077 is an apocalyptic number.

It is an amenable number.

161892077 is a deficient number, since it is larger than the sum of its proper divisors (37363).

161892077 is an equidigital number, since it uses as much as digits as its factorization.

161892077 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37362.

The product of its (nonzero) digits is 42336, while the sum is 41.

The square root of 161892077 is about 12723.6817391823. The cubic root of 161892077 is about 545.0150959542.

The spelling of 161892077 in words is "one hundred sixty-one million, eight hundred ninety-two thousand, seventy-seven".