7917149 has 4 divisors (see below), whose sum is σ = 8131164. Its totient is φ = 7703136.

The previous prime is 7917137. The next prime is 7917179. The reversal of 7917149 is 9417197.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9417197 = 131 ⋅71887.

It can be written as a sum of positive squares in 2 ways, for example, as 5373124 + 2544025 = 2318^2 + 1595^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7917149 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 (7917109) 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, 106952 + ... + 107025.

It is an arithmetic number, because the mean of its divisors is an integer number (2032791).

Almost surely, 2^7917149 is an apocalyptic number.

It is an amenable number.

7917149 is a deficient number, since it is larger than the sum of its proper divisors (214015).

7917149 is a wasteful number, since it uses less digits than its factorization.

7917149 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 214014.

The product of its digits is 15876, while the sum is 38.

The square root of 7917149 is about 2813.7428809328. The cubic root of 7917149 is about 199.3071777580.

The spelling of 7917149 in words is "seven million, nine hundred seventeen thousand, one hundred forty-nine".