12649719 has 4 divisors (see below), whose sum is σ = 16866296. Its totient is φ = 8433144.

The previous prime is 12649709. The next prime is 12649727. The reversal of 12649719 is 91794621.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 12649719 - 2⁷ = 12649591 is a prime.

It is a super-2 number, since 2×12649719² = 320030781557922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12649709) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2108284 + ... + 2108289.

It is an arithmetic number, because the mean of its divisors is an integer number (4216574).

Almost surely, 2^12649719 is an apocalyptic number.

12649719 is a deficient number, since it is larger than the sum of its proper divisors (4216577).

12649719 is an equidigital number, since it uses as much as digits as its factorization.

12649719 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4216576.

The product of its digits is 27216, while the sum is 39.

The square root of 12649719 is about 3556.6443454470. The cubic root of 12649719 is about 233.0023454485.

The spelling of 12649719 in words is "twelve million, six hundred forty-nine thousand, seven hundred nineteen".