1231687163 has 8 divisors (see below), whose sum is σ = 1413685728. Its totient is φ = 1051199424.

The previous prime is 1231687157. The next prime is 1231687181. The reversal of 1231687163 is 3617861321.

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 1231687163 - 2⁴ = 1231687147 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1231687153) 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 7 ways as a sum of consecutive naturals, for example, 375956 + ... + 379217.

It is an arithmetic number, because the mean of its divisors is an integer number (176710716).

Almost surely, 2^1231687163 is an apocalyptic number.

1231687163 is a deficient number, since it is larger than the sum of its proper divisors (181998565).

1231687163 is an equidigital number, since it uses as much as digits as its factorization.

1231687163 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 755413.

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

The square root of 1231687163 is about 35095.4008810271. The cubic root of 1231687163 is about 1071.9309364038.

The spelling of 1231687163 in words is "one billion, two hundred thirty-one million, six hundred eighty-seven thousand, one hundred sixty-three".