161603387 has 8 divisors (see below), whose sum is σ = 176443392. Its totient is φ = 146788200.

The previous prime is 161603357. The next prime is 161603389. The reversal of 161603387 is 783306161.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-161603387 is a prime.

It is a super-2 number, since 2×161603387² = 52231309379743538, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (161603389) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9062 + ... + 20132.

It is an arithmetic number, because the mean of its divisors is an integer number (22055424).

Almost surely, 2^161603387 is an apocalyptic number.

161603387 is a deficient number, since it is larger than the sum of its proper divisors (14840005).

161603387 is a wasteful number, since it uses less digits than its factorization.

161603387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12409.

The product of its (nonzero) digits is 18144, while the sum is 35.

The square root of 161603387 is about 12712.3320834535. The cubic root of 161603387 is about 544.6909416818.

The spelling of 161603387 in words is "one hundred sixty-one million, six hundred three thousand, three hundred eighty-seven".