161203583 has 8 divisors (see below), whose sum is σ = 163691136. Its totient is φ = 158722200.

The previous prime is 161203579. The next prime is 161203589. The reversal of 161203583 is 385302161.

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

It is a cyclic number.

It is not a de Polignac number, because 161203583 - 2² = 161203579 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 (161203589) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 104528 + ... + 106058.

It is an arithmetic number, because the mean of its divisors is an integer number (20461392).

Almost surely, 2^161203583 is an apocalyptic number.

161203583 is a deficient number, since it is larger than the sum of its proper divisors (2487553).

161203583 is a wasteful number, since it uses less digits than its factorization.

161203583 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3085.

The product of its (nonzero) digits is 4320, while the sum is 29.

The square root of 161203583 is about 12696.5973000643. The cubic root of 161203583 is about 544.2413854058.

The spelling of 161203583 in words is "one hundred sixty-one million, two hundred three thousand, five hundred eighty-three".