12971913 has 8 divisors (see below), whose sum is σ = 17539776. Its totient is φ = 8526000.

The previous prime is 12971911. The next prime is 12971929. The reversal of 12971913 is 31917921.

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

It is not a de Polignac number, because 12971913 - 2¹ = 12971911 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12971911) 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, 30238 + ... + 30663.

It is an arithmetic number, because the mean of its divisors is an integer number (2192472).

Almost surely, 2^12971913 is an apocalyptic number.

It is an amenable number.

12971913 is a deficient number, since it is larger than the sum of its proper divisors (4567863).

12971913 is an equidigital number, since it uses as much as digits as its factorization.

12971913 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60975.

The product of its digits is 3402, while the sum is 33.

The square root of 12971913 is about 3601.6542032794. The cubic root of 12971913 is about 234.9640083706.

The spelling of 12971913 in words is "twelve million, nine hundred seventy-one thousand, nine hundred thirteen".