7897427 has 4 divisors (see below), whose sum is σ = 7905000. Its totient is φ = 7889856.

The previous prime is 7897411. The next prime is 7897453. The reversal of 7897427 is 7247987.

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 7897427 - 2⁴ = 7897411 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7897727) 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, 1913 + ... + 4410.

It is an arithmetic number, because the mean of its divisors is an integer number (1976250).

Almost surely, 2^7897427 is an apocalyptic number.

7897427 is a deficient number, since it is larger than the sum of its proper divisors (7573).

7897427 is a wasteful number, since it uses less digits than its factorization.

7897427 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7572.

The product of its digits is 197568, while the sum is 44.

The square root of 7897427 is about 2810.2361110768. The cubic root of 7897427 is about 199.1415455517.

The spelling of 7897427 in words is "seven million, eight hundred ninety-seven thousand, four hundred twenty-seven".