12977829 has 6 divisors (see below), whose sum is σ = 18745766. Its totient is φ = 8651880.

The previous prime is 12977827. The next prime is 12977831. The reversal of 12977829 is 92877921.

It is an interprime number because it is at equal distance from previous prime (12977827) and next prime (12977831).

It can be written as a sum of positive squares in only one way, i.e., 11573604 + 1404225 = 3402^2 + 1185^2 .

It is not a de Polignac number, because 12977829 - 2¹ = 12977827 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 (12977821) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 720982 + ... + 720999.

Almost surely, 2^12977829 is an apocalyptic number.

It is an amenable number.

12977829 is a deficient number, since it is larger than the sum of its proper divisors (5767937).

12977829 is a wasteful number, since it uses less digits than its factorization.

12977829 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1441987 (or 1441984 counting only the distinct ones).

The product of its digits is 127008, while the sum is 45.

The square root of 12977829 is about 3602.4753989445. The cubic root of 12977829 is about 234.9997223476. Note that the first 3 decimals are identical.

The spelling of 12977829 in words is "twelve million, nine hundred seventy-seven thousand, eight hundred twenty-nine".