1731066161 has 4 divisors (see below), whose sum is σ = 1888435824. Its totient is φ = 1573696500.

The previous prime is 1731066137. The next prime is 1731066167. The reversal of 1731066161 is 1616601371.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1731066161 - 2²² = 1726871857 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1731066167) 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, 78684815 + ... + 78684836.

It is an arithmetic number, because the mean of its divisors is an integer number (472108956).

Almost surely, 2^1731066161 is an apocalyptic number.

1731066161 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1731066161 is a deficient number, since it is larger than the sum of its proper divisors (157369663).

1731066161 is a wasteful number, since it uses less digits than its factorization.

1731066161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 157369662.

The product of its (nonzero) digits is 4536, while the sum is 32.

The square root of 1731066161 is about 41606.0832210868. The cubic root of 1731066161 is about 1200.7093401053.

The spelling of 1731066161 in words is "one billion, seven hundred thirty-one million, sixty-six thousand, one hundred sixty-one".