7290397 has 4 divisors (see below), whose sum is σ = 7541820. Its totient is φ = 7038976.

The previous prime is 7290391. The next prime is 7290401. The reversal of 7290397 is 7930927.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7930927 = 269 ⋅29483.

It can be written as a sum of positive squares in 2 ways, for example, as 3334276 + 3956121 = 1826^2 + 1989^2 .

It is a cyclic number.

It is not a de Polignac number, because 7290397 - 2³ = 7290389 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 (7290391) 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, 125668 + ... + 125725.

It is an arithmetic number, because the mean of its divisors is an integer number (1885455).

Almost surely, 2^7290397 is an apocalyptic number.

It is an amenable number.

7290397 is a deficient number, since it is larger than the sum of its proper divisors (251423).

7290397 is a wasteful number, since it uses less digits than its factorization.

7290397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 251422.

The product of its (nonzero) digits is 23814, while the sum is 37.

The square root of 7290397 is about 2700.0735175176. The cubic root of 7290397 is about 193.9026418356.

The spelling of 7290397 in words is "seven million, two hundred ninety thousand, three hundred ninety-seven".