7900723 has 4 divisors (see below), whose sum is σ = 7906360. Its totient is φ = 7895088.

The previous prime is 7900709. The next prime is 7900757. The reversal of 7900723 is 3270097.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 7900723 - 2¹³ = 7892531 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 7900691 and 7900700.

It is not an unprimeable number, because it can be changed into a prime (7900793) 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, 1108 + ... + 4126.

It is an arithmetic number, because the mean of its divisors is an integer number (1976590).

Almost surely, 2^7900723 is an apocalyptic number.

7900723 is a deficient number, since it is larger than the sum of its proper divisors (5637).

7900723 is a wasteful number, since it uses less digits than its factorization.

7900723 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5636.

The product of its (nonzero) digits is 2646, while the sum is 28.

The square root of 7900723 is about 2810.8224774966. The cubic root of 7900723 is about 199.1692456809.

The spelling of 7900723 in words is "seven million, nine hundred thousand, seven hundred twenty-three".