161293927 has 4 divisors (see below), whose sum is σ = 161445880. Its totient is φ = 161141976.

The previous prime is 161293901. The next prime is 161293973. The reversal of 161293927 is 729392161.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 161293927 - 2¹⁹ = 160769639 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 161293927.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161293997) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 74373 + ... + 76510.

It is an arithmetic number, because the mean of its divisors is an integer number (40361470).

Almost surely, 2^161293927 is an apocalyptic number.

161293927 is a deficient number, since it is larger than the sum of its proper divisors (151953).

161293927 is a wasteful number, since it uses less digits than its factorization.

161293927 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 151952.

The product of its digits is 40824, while the sum is 40.

The square root of 161293927 is about 12700.1546053582. The cubic root of 161293927 is about 544.3430369124.

The spelling of 161293927 in words is "one hundred sixty-one million, two hundred ninety-three thousand, nine hundred twenty-seven".