161349877 has 12 divisors (see below), whose sum is σ = 175436940. Its totient is φ = 148388760.

The previous prime is 161349847. The next prime is 161349887. The reversal of 161349877 is 778943161.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It can be written as a sum of positive squares in 2 ways, for example, as 5948721 + 155401156 = 2439^2 + 12466^2 .

It is not a de Polignac number, because 161349877 - 2¹⁹ = 160825589 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 (161349827) 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 11 ways as a sum of consecutive naturals, for example, 595252 + ... + 595522.

It is an arithmetic number, because the mean of its divisors is an integer number (14619745).

Almost surely, 2^161349877 is an apocalyptic number.

It is an amenable number.

161349877 is a deficient number, since it is larger than the sum of its proper divisors (14087063).

161349877 is an frugal number, since it uses more digits than its factorization.

161349877 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 581 (or 284 counting only the distinct ones).

The product of its digits is 254016, while the sum is 46.

The square root of 161349877 is about 12702.3571434596. The cubic root of 161349877 is about 544.4059706149.

The spelling of 161349877 in words is "one hundred sixty-one million, three hundred forty-nine thousand, eight hundred seventy-seven".