161203023 has 6 divisors (see below), whose sum is σ = 232848824. Its totient is φ = 107468676.

The previous prime is 161203019. The next prime is 161203037. The reversal of 161203023 is 320302161.

161203023 is a `hidden beast` number, since 1 + 612 + 0 + 30 + 23 = 666.

It is not a de Polignac number, because 161203023 - 2² = 161203019 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 161202987 and 161203005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161203073) 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, 8955715 + ... + 8955732.

Almost surely, 2^161203023 is an apocalyptic number.

161203023 is a deficient number, since it is larger than the sum of its proper divisors (71645801).

161203023 is a wasteful number, since it uses less digits than its factorization.

161203023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17911453 (or 17911450 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

The square root of 161203023 is about 12696.5752468924. The cubic root of 161203023 is about 544.2407551974.

Adding to 161203023 its reverse (320302161), we get a palindrome (481505184).

The spelling of 161203023 in words is "one hundred sixty-one million, two hundred three thousand, twenty-three".