161314393 has 4 divisors (see below), whose sum is σ = 162742068. Its totient is φ = 159886720.

The previous prime is 161314381. The next prime is 161314423. The reversal of 161314393 is 393413161.

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

It can be written as a sum of positive squares in 2 ways, for example, as 1468944 + 159845449 = 1212^2 + 12643^2 .

It is a cyclic number.

It is not a de Polignac number, because 161314393 - 2²¹ = 159217241 is a prime.

It is a super-3 number, since 3×161314393³ (a number of 26 digits) contains 333 as substring.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (161314193) 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, 713668 + ... + 713893.

It is an arithmetic number, because the mean of its divisors is an integer number (40685517).

Almost surely, 2^161314393 is an apocalyptic number.

It is an amenable number.

161314393 is a deficient number, since it is larger than the sum of its proper divisors (1427675).

161314393 is a wasteful number, since it uses less digits than its factorization.

161314393 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1427674.

The product of its digits is 5832, while the sum is 31.

The square root of 161314393 is about 12700.9603180232. The cubic root of 161314393 is about 544.3660591750.

The spelling of 161314393 in words is "one hundred sixty-one million, three hundred fourteen thousand, three hundred ninety-three".