161695073 has 8 divisors (see below), whose sum is σ = 172538400. Its totient is φ = 151085088.

The previous prime is 161695063. The next prime is 161695081. The reversal of 161695073 is 370596161.

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 161695073 - 2⁴ = 161695057 is a prime.

It is a super-2 number, since 2×161695073² = 52290593264950658, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (161695013) 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, 56903 + ... + 59676.

It is an arithmetic number, because the mean of its divisors is an integer number (21567300).

Almost surely, 2^161695073 is an apocalyptic number.

It is an amenable number.

161695073 is a deficient number, since it is larger than the sum of its proper divisors (10843327).

161695073 is a wasteful number, since it uses less digits than its factorization.

161695073 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 116671.

The product of its (nonzero) digits is 34020, while the sum is 38.

The square root of 161695073 is about 12715.9377554312. The cubic root of 161695073 is about 544.7939326999.

The spelling of 161695073 in words is "one hundred sixty-one million, six hundred ninety-five thousand, seventy-three".