12477797 has 4 divisors (see below), whose sum is σ = 12513900. Its totient is φ = 12441696.

The previous prime is 12477793. The next prime is 12477811. The reversal of 12477797 is 79777421.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 79777421 = 2287 ⋅34883.

It can be written as a sum of positive squares in 2 ways, for example, as 10407076 + 2070721 = 3226^2 + 1439^2 .

It is a cyclic number.

It is not a de Polignac number, because 12477797 - 2² = 12477793 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 (12477791) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17528 + ... + 18225.

It is an arithmetic number, because the mean of its divisors is an integer number (3128475).

Almost surely, 2^12477797 is an apocalyptic number.

It is an amenable number.

12477797 is a deficient number, since it is larger than the sum of its proper divisors (36103).

12477797 is an equidigital number, since it uses as much as digits as its factorization.

12477797 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36102.

The product of its digits is 172872, while the sum is 44.

The square root of 12477797 is about 3532.3925319817. The cubic root of 12477797 is about 231.9419506470.

The spelling of 12477797 in words is "twelve million, four hundred seventy-seven thousand, seven hundred ninety-seven".