161397 has 12 divisors (see below), whose sum is σ = 237120. Its totient is φ = 105768.

The previous prime is 161387. The next prime is 161407. The reversal of 161397 is 793161.

It is an interprime number because it is at equal distance from previous prime (161387) and next prime (161407).

It is not a de Polignac number, because 161397 - 2⁶ = 161333 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 161397.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 161397.

It is not an unprimeable number, because it can be changed into a prime (161377) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 598 + ... + 824.

It is an arithmetic number, because the mean of its divisors is an integer number (19760).

2¹⁶¹³⁹⁷ is an apocalyptic number.

It is an amenable number.

161397 is a deficient number, since it is larger than the sum of its proper divisors (75723).

161397 is a wasteful number, since it uses less digits than its factorization.

161397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 312 (or 309 counting only the distinct ones).

The product of its digits is 1134, while the sum is 27.

The square root of 161397 is about 401.7424548140. The cubic root of 161397 is about 54.4458964242.

The spelling of 161397 in words is "one hundred sixty-one thousand, three hundred ninety-seven".