161678359 has 4 divisors (see below), whose sum is σ = 161783104. Its totient is φ = 161573616.

The previous prime is 161678357. The next prime is 161678369. The reversal of 161678359 is 953876161.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 953876161 = 7 ⋅136268023.

It is a cyclic number.

It is not a de Polignac number, because 161678359 - 2¹ = 161678357 is a prime.

It is a super-2 number, since 2×161678359² = 52279783537865762, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161678357) 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 3 ways as a sum of consecutive naturals, for example, 50022 + ... + 53155.

It is an arithmetic number, because the mean of its divisors is an integer number (40445776).

Almost surely, 2^161678359 is an apocalyptic number.

161678359 is a deficient number, since it is larger than the sum of its proper divisors (104745).

161678359 is a wasteful number, since it uses less digits than its factorization.

161678359 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104744.

The product of its digits is 272160, while the sum is 46.

The square root of 161678359 is about 12715.2805317067. The cubic root of 161678359 is about 544.7751607415.

The spelling of 161678359 in words is "one hundred sixty-one million, six hundred seventy-eight thousand, three hundred fifty-nine".