7917973 has 4 divisors (see below), whose sum is σ = 9049120. Its totient is φ = 6786828.

The previous prime is 7917967. The next prime is 7917997. The reversal of 7917973 is 3797197.

It is a happy number.

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: 3797197 = 151 ⋅25147.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7917973 is a prime.

It is a Duffinian number.

7917973 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7917953) 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, 565563 + ... + 565576.

It is an arithmetic number, because the mean of its divisors is an integer number (2262280).

Almost surely, 2^7917973 is an apocalyptic number.

It is an amenable number.

7917973 is a deficient number, since it is larger than the sum of its proper divisors (1131147).

7917973 is a wasteful number, since it uses less digits than its factorization.

7917973 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1131146.

The product of its digits is 83349, while the sum is 43.

The square root of 7917973 is about 2813.8893013052. The cubic root of 7917973 is about 199.3140920070.

The spelling of 7917973 in words is "seven million, nine hundred seventeen thousand, nine hundred seventy-three".