7912649 has 4 divisors (see below), whose sum is σ = 7933380. Its totient is φ = 7891920.

The previous prime is 7912603. The next prime is 7912651. The reversal of 7912649 is 9462197.

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

It can be written as a sum of positive squares in 2 ways, for example, as 3367225 + 4545424 = 1835^2 + 2132^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7912649 is a prime.

It is a super-2 number, since 2×7912649² = 125220028394402, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7912669) 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 3 ways as a sum of consecutive naturals, for example, 9782 + ... + 10559.

It is an arithmetic number, because the mean of its divisors is an integer number (1983345).

Almost surely, 2^7912649 is an apocalyptic number.

It is an amenable number.

7912649 is a deficient number, since it is larger than the sum of its proper divisors (20731).

7912649 is a wasteful number, since it uses less digits than its factorization.

7912649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20730.

The product of its digits is 27216, while the sum is 38.

The square root of 7912649 is about 2812.9431206478. The cubic root of 7912649 is about 199.2694094368.

The spelling of 7912649 in words is "seven million, nine hundred twelve thousand, six hundred forty-nine".