180671997 has 12 divisors (see below), whose sum is σ = 264787040. Its totient is φ = 109497960.

The previous prime is 180671977. The next prime is 180672017. The reversal of 180671997 is 799176081.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (180671977) and next prime (180672017).

It is not a de Polignac number, because 180671997 - 2¹² = 180667901 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (180671917) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 248497 + ... + 249222.

Almost surely, 2^180671997 is an apocalyptic number.

It is an amenable number.

180671997 is a deficient number, since it is larger than the sum of its proper divisors (84115043).

180671997 is a wasteful number, since it uses less digits than its factorization.

180671997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 497744 (or 497733 counting only the distinct ones).

The product of its (nonzero) digits is 190512, while the sum is 48.

The square root of 180671997 is about 13441.4283839181. The cubic root of 180671997 is about 565.3233818468.

The spelling of 180671997 in words is "one hundred eighty million, six hundred seventy-one thousand, nine hundred ninety-seven".