161594943 has 16 divisors (see below), whose sum is σ = 227834880. Its totient is φ = 101594304.

The previous prime is 161594929. The next prime is 161594957. The reversal of 161594943 is 349495161.

It is a Cunningham number, because it is equal to 12712²-1.

It is an interprime number because it is at equal distance from previous prime (161594929) and next prime (161594957).

It is not a de Polignac number, because 161594943 - 2¹⁴ = 161578559 is a prime.

It is a super-2 number, since 2×161594943² = 52225851206346498, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 161594895 and 161594904.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161590943) 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 15 ways as a sum of consecutive naturals, for example, 6355 + ... + 19067.

It is an arithmetic number, because the mean of its divisors is an integer number (14239680).

Almost surely, 2^161594943 is an apocalyptic number.

161594943 is a deficient number, since it is larger than the sum of its proper divisors (66239937).

161594943 is a wasteful number, since it uses less digits than its factorization.

161594943 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12958.

The product of its digits is 116640, while the sum is 42.

The square root of 161594943 is about 12711.9999606671. Note that the first 4 decimals coincide. The cubic root of 161594943 is about 544.6814545655.

The spelling of 161594943 in words is "one hundred sixty-one million, five hundred ninety-four thousand, nine hundred forty-three".