1681763231 has 8 divisors (see below), whose sum is σ = 1689498624. Its totient is φ = 1674038520.

The previous prime is 1681763203. The next prime is 1681763263. The reversal of 1681763231 is 1323671861.

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 1681763231 - 2²⁶ = 1614654367 is a prime.

It is a super-2 number, since 2×1681763231² = 5656655130287118722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1681763201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 606410 + ... + 609176.

It is an arithmetic number, because the mean of its divisors is an integer number (211187328).

Almost surely, 2^1681763231 is an apocalyptic number.

1681763231 is a deficient number, since it is larger than the sum of its proper divisors (7735393).

1681763231 is a wasteful number, since it uses less digits than its factorization.

1681763231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5341.

The product of its digits is 36288, while the sum is 38.

The square root of 1681763231 is about 41009.3066388594. The cubic root of 1681763231 is about 1189.2001382910.

The spelling of 1681763231 in words is "one billion, six hundred eighty-one million, seven hundred sixty-three thousand, two hundred thirty-one".