7140813 has 4 divisors (see below), whose sum is σ = 9521088. Its totient is φ = 4760540.

The previous prime is 7140803. The next prime is 7140817. The reversal of 7140813 is 3180417.

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.

It is a cyclic number.

It is not a de Polignac number, because 7140813 - 2⁴ = 7140797 is a prime.

It is a Curzon number.

7140813 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7140817) 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, 1190133 + ... + 1190138.

It is an arithmetic number, because the mean of its divisors is an integer number (2380272).

Almost surely, 2^7140813 is an apocalyptic number.

It is an amenable number.

7140813 is a deficient number, since it is larger than the sum of its proper divisors (2380275).

7140813 is a wasteful number, since it uses less digits than its factorization.

7140813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2380274.

The product of its (nonzero) digits is 672, while the sum is 24.

The square root of 7140813 is about 2672.2299676487. The cubic root of 7140813 is about 192.5673054128.

The spelling of 7140813 in words is "seven million, one hundred forty thousand, eight hundred thirteen".