161670123 has 6 divisors (see below), whose sum is σ = 233523524. Its totient is φ = 107780076.

The previous prime is 161670121. The next prime is 161670127. The reversal of 161670123 is 321076161.

It is not a de Polignac number, because 161670123 - 2¹ = 161670121 is a prime.

It is a super-2 number, since 2×161670123² = 52274457341670258, which contains 22 as substring.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (161670121) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 8981665 + ... + 8981682.

Almost surely, 2^161670123 is an apocalyptic number.

161670123 is a deficient number, since it is larger than the sum of its proper divisors (71853401).

161670123 is a wasteful number, since it uses less digits than its factorization.

161670123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17963353 (or 17963350 counting only the distinct ones).

The product of its (nonzero) digits is 1512, while the sum is 27.

The square root of 161670123 is about 12714.9566652820. The cubic root of 161670123 is about 544.7659101849.

The spelling of 161670123 in words is "one hundred sixty-one million, six hundred seventy thousand, one hundred twenty-three".