161317387 has 16 divisors (see below), whose sum is σ = 204537600. Its totient is φ = 123567840.

The previous prime is 161317379. The next prime is 161317393. The reversal of 161317387 is 783713161.

It is a happy number.

It is not a de Polignac number, because 161317387 - 2³ = 161317379 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (161317327) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13212 + ... + 22297.

It is an arithmetic number, because the mean of its divisors is an integer number (12783600).

Almost surely, 2^161317387 is an apocalyptic number.

161317387 is a deficient number, since it is larger than the sum of its proper divisors (43220213).

161317387 is a wasteful number, since it uses less digits than its factorization.

161317387 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35586.

The product of its digits is 21168, while the sum is 37.

The square root of 161317387 is about 12701.0781825796. The cubic root of 161317387 is about 544.3694269710.

The spelling of 161317387 in words is "one hundred sixty-one million, three hundred seventeen thousand, three hundred eighty-seven".