7820173 has 4 divisors (see below), whose sum is σ = 7936960. Its totient is φ = 7703388.

The previous prime is 7820171. The next prime is 7820231. The reversal of 7820173 is 3710287.

It is a happy number.

7820173 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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: 3710287 = 7 ⋅530041.

It is a cyclic number.

It is not a de Polignac number, because 7820173 - 2¹ = 7820171 is a prime.

It is a super-2 number, since 2×7820173² = 122310211499858, which contains 22 as substring.

It is a Duffinian number.

7820173 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7820171) 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, 58293 + ... + 58426.

It is an arithmetic number, because the mean of its divisors is an integer number (1984240).

Almost surely, 2^7820173 is an apocalyptic number.

It is an amenable number.

7820173 is a deficient number, since it is larger than the sum of its proper divisors (116787).

7820173 is a wasteful number, since it uses less digits than its factorization.

7820173 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 116786.

The product of its (nonzero) digits is 2352, while the sum is 28.

The square root of 7820173 is about 2796.4572229877. The cubic root of 7820173 is about 198.4900709248.

The spelling of 7820173 in words is "seven million, eight hundred twenty thousand, one hundred seventy-three".