12961613 has 8 divisors (see below), whose sum is σ = 15128832. Its totient is φ = 10873296.

The previous prime is 12961607. The next prime is 12961621. The reversal of 12961613 is 31616921.

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

It is not a de Polignac number, because 12961613 - 2¹⁸ = 12699469 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 (12961603) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19370 + ... + 20027.

It is an arithmetic number, because the mean of its divisors is an integer number (1891104).

Almost surely, 2^12961613 is an apocalyptic number.

It is an amenable number.

12961613 is a deficient number, since it is larger than the sum of its proper divisors (2167219).

12961613 is an equidigital number, since it uses as much as digits as its factorization.

12961613 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39451.

The product of its digits is 1944, while the sum is 29.

The square root of 12961613 is about 3600.2240208076. The cubic root of 12961613 is about 234.9018029447.

The spelling of 12961613 in words is "twelve million, nine hundred sixty-one thousand, six hundred thirteen".