161340023 has 8 divisors (see below), whose sum is σ = 174519408. Its totient is φ = 148270464.

The previous prime is 161339989. The next prime is 161340029. The reversal of 161340023 is 320043161.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 161340023 - 2¹⁸ = 161077879 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 161339977 and 161340004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161340029) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24386 + ... + 30287.

It is an arithmetic number, because the mean of its divisors is an integer number (21814926).

Almost surely, 2^161340023 is an apocalyptic number.

161340023 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

161340023 is a deficient number, since it is larger than the sum of its proper divisors (13179385).

161340023 is a wasteful number, since it uses less digits than its factorization.

161340023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54913.

The product of its (nonzero) digits is 432, while the sum is 20.

The square root of 161340023 is about 12701.9692567727. The cubic root of 161340023 is about 544.3948876901.

Adding to 161340023 its reverse (320043161), we get a palindrome (481383184).

The spelling of 161340023 in words is "one hundred sixty-one million, three hundred forty thousand, twenty-three".