12691023 has 8 divisors (see below), whose sum is σ = 16940928. Its totient is φ = 8450904.

The previous prime is 12691001. The next prime is 12691033. The reversal of 12691023 is 32019621.

12691023 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 12691023 - 2⁵ = 12690991 is a prime.

It is a super-2 number, since 2×12691023² = 322124129573058, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 12690984 and 12691002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12691033) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1486 + ... + 5252.

It is an arithmetic number, because the mean of its divisors is an integer number (2117616).

Almost surely, 2^12691023 is an apocalyptic number.

12691023 is a deficient number, since it is larger than the sum of its proper divisors (4249905).

12691023 is a wasteful number, since it uses less digits than its factorization.

12691023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4893.

The product of its (nonzero) digits is 648, while the sum is 24.

The square root of 12691023 is about 3562.4462101202. The cubic root of 12691023 is about 233.2556705254.

The spelling of 12691023 in words is "twelve million, six hundred ninety-one thousand, twenty-three".