161867069 has 8 divisors (see below), whose sum is σ = 199221120. Its totient is φ = 128070576.

The previous prime is 161867063. The next prime is 161867087. The reversal of 161867069 is 960768161.

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 161867069 - 2¹⁶ = 161801533 is a prime.

It is a super-2 number, since 2×161867069² = 52401896053301522, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161867063) 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, 889289 + ... + 889470.

It is an arithmetic number, because the mean of its divisors is an integer number (24902640).

Almost surely, 2^161867069 is an apocalyptic number.

It is an amenable number.

161867069 is a deficient number, since it is larger than the sum of its proper divisors (37354051).

161867069 is a wasteful number, since it uses less digits than its factorization.

161867069 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1778779.

The product of its (nonzero) digits is 108864, while the sum is 44.

The square root of 161867069 is about 12722.6989668073. The cubic root of 161867069 is about 544.9870310861.

The spelling of 161867069 in words is "one hundred sixty-one million, eight hundred sixty-seven thousand, sixty-nine".