161793129 has 16 divisors (see below), whose sum is σ = 221202432. Its totient is φ = 105141648.

The previous prime is 161793127. The next prime is 161793173. The reversal of 161793129 is 921397161.

It is a happy number.

It is not a de Polignac number, because 161793129 - 2¹ = 161793127 is a prime.

It is a super-2 number, since 2×161793129² = 52354033183221282, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (161793127) 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, 34902 + ... + 39264.

It is an arithmetic number, because the mean of its divisors is an integer number (13825152).

Almost surely, 2^161793129 is an apocalyptic number.

It is an amenable number.

161793129 is a deficient number, since it is larger than the sum of its proper divisors (59409303).

161793129 is a wasteful number, since it uses less digits than its factorization.

161793129 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4676.

The product of its digits is 20412, while the sum is 39.

The square root of 161793129 is about 12719.7928049163. The cubic root of 161793129 is about 544.9040360733.

The spelling of 161793129 in words is "one hundred sixty-one million, seven hundred ninety-three thousand, one hundred twenty-nine".