161582727 has 4 divisors (see below), whose sum is σ = 215443640. Its totient is φ = 107721816.

The previous prime is 161582719. The next prime is 161582767. The reversal of 161582727 is 727285161.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 727285161 = 3 ⋅242428387.

It is not a de Polignac number, because 161582727 - 2³ = 161582719 is a prime.

It is a super-2 number, since 2×161582727² = 52217955329513058, 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 (161582767) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26930452 + ... + 26930457.

It is an arithmetic number, because the mean of its divisors is an integer number (53860910).

Almost surely, 2^161582727 is an apocalyptic number.

161582727 is a deficient number, since it is larger than the sum of its proper divisors (53860913).

161582727 is an equidigital number, since it uses as much as digits as its factorization.

161582727 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53860912.

The product of its digits is 47040, while the sum is 39.

The square root of 161582727 is about 12711.5194607096. The cubic root of 161582727 is about 544.6677288960.

The spelling of 161582727 in words is "one hundred sixty-one million, five hundred eighty-two thousand, seven hundred twenty-seven".