7287913 has 4 divisors (see below), whose sum is σ = 7303248. Its totient is φ = 7272580.

The previous prime is 7287911. The next prime is 7287919. The reversal of 7287913 is 3197827.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 3197827 = 353 ⋅9059.

It is a cyclic number.

It is not a de Polignac number, because 7287913 - 2¹ = 7287911 is a prime.

It is a super-2 number, since 2×7287913² = 106227351791138, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7287911) 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, 6931 + ... + 7912.

It is an arithmetic number, because the mean of its divisors is an integer number (1825812).

Almost surely, 2^7287913 is an apocalyptic number.

It is an amenable number.

7287913 is a deficient number, since it is larger than the sum of its proper divisors (15335).

7287913 is a wasteful number, since it uses less digits than its factorization.

7287913 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15334.

The product of its digits is 21168, while the sum is 37.

The square root of 7287913 is about 2699.6134908538. The cubic root of 7287913 is about 193.8806170233.

The spelling of 7287913 in words is "seven million, two hundred eighty-seven thousand, nine hundred thirteen".