161346277 has 4 divisors (see below), whose sum is σ = 165098560. Its totient is φ = 157593996.

The previous prime is 161346239. The next prime is 161346287. The reversal of 161346277 is 772643161.

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 161346277 - 2⁷ = 161346149 is a prime.

It is a super-2 number, since 2×161346277² = 52065242203521458, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161346287) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1876077 + ... + 1876162.

It is an arithmetic number, because the mean of its divisors is an integer number (41274640).

Almost surely, 2^161346277 is an apocalyptic number.

It is an amenable number.

161346277 is a deficient number, since it is larger than the sum of its proper divisors (3752283).

161346277 is an equidigital number, since it uses as much as digits as its factorization.

161346277 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3752282.

The product of its digits is 42336, while the sum is 37.

The square root of 161346277 is about 12702.2154366866. The cubic root of 161346277 is about 544.4019216994.

The spelling of 161346277 in words is "one hundred sixty-one million, three hundred forty-six thousand, two hundred seventy-seven".