161339867 has 4 divisors (see below), whose sum is σ = 173750640. Its totient is φ = 148929096.

The previous prime is 161339863. The next prime is 161339873. The reversal of 161339867 is 768933161.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 768933161 = 4919 ⋅156319.

It is a cyclic number.

It is not a de Polignac number, because 161339867 - 2² = 161339863 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (161339863) 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, 6205367 + ... + 6205392.

It is an arithmetic number, because the mean of its divisors is an integer number (43437660).

Almost surely, 2^161339867 is an apocalyptic number.

161339867 is a deficient number, since it is larger than the sum of its proper divisors (12410773).

161339867 is a wasteful number, since it uses less digits than its factorization.

161339867 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12410772.

The product of its digits is 163296, while the sum is 44.

The square root of 161339867 is about 12701.9631159912. The cubic root of 161339867 is about 544.3947122312.

The spelling of 161339867 in words is "one hundred sixty-one million, three hundred thirty-nine thousand, eight hundred sixty-seven".