161734887 has 20 divisors (see below), whose sum is σ = 243875016. Its totient is φ = 106809840.

The previous prime is 161734877. The next prime is 161734907. The reversal of 161734887 is 788437161.

161734887 is a `hidden beast` number, since 161 + 7 + 3 + 488 + 7 = 666.

It is not a de Polignac number, because 161734887 - 2¹² = 161730791 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161734817) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 664 + ... + 17997.

Almost surely, 2^161734887 is an apocalyptic number.

161734887 is a deficient number, since it is larger than the sum of its proper divisors (82140129).

161734887 is a wasteful number, since it uses less digits than its factorization.

161734887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18780 (or 18771 counting only the distinct ones).

The product of its digits is 225792, while the sum is 45.

The square root of 161734887 is about 12717.5031747588. The cubic root of 161734887 is about 544.8386437007.

The spelling of 161734887 in words is "one hundred sixty-one million, seven hundred thirty-four thousand, eight hundred eighty-seven".