160117621 has 4 divisors (see below), whose sum is σ = 161586700. Its totient is φ = 158648544.

The previous prime is 160117597. The next prime is 160117631. The reversal of 160117621 is 126711061.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 126711061 = 199 ⋅636739.

It can be written as a sum of positive squares in 2 ways, for example, as 146531025 + 13586596 = 12105^2 + 3686^2 .

It is a cyclic number.

It is not a de Polignac number, because 160117621 - 2⁷ = 160117493 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 (160117631) 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, 734376 + ... + 734593.

It is an arithmetic number, because the mean of its divisors is an integer number (40396675).

Almost surely, 2^160117621 is an apocalyptic number.

It is an amenable number.

160117621 is a deficient number, since it is larger than the sum of its proper divisors (1469079).

160117621 is a wasteful number, since it uses less digits than its factorization.

160117621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1469078.

The product of its (nonzero) digits is 504, while the sum is 25.

The square root of 160117621 is about 12653.7591647700. The cubic root of 160117621 is about 543.0165209484.

Adding to 160117621 its reverse (126711061), we get a palindrome (286828682).

It can be divided in two parts, 16011 and 7621, that added together give a palindrome (23632).

The spelling of 160117621 in words is "one hundred sixty million, one hundred seventeen thousand, six hundred twenty-one".