7867397 has 4 divisors (see below), whose sum is σ = 8121216. Its totient is φ = 7613580.

The previous prime is 7867393. The next prime is 7867411. The reversal of 7867397 is 7937687.

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: 7937687 = 19 ⋅417773.

It is a cyclic number.

It is not a de Polignac number, because 7867397 - 2² = 7867393 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7867393) 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, 126863 + ... + 126924.

It is an arithmetic number, because the mean of its divisors is an integer number (2030304).

Almost surely, 2^7867397 is an apocalyptic number.

It is an amenable number.

7867397 is a deficient number, since it is larger than the sum of its proper divisors (253819).

7867397 is a wasteful number, since it uses less digits than its factorization.

7867397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 253818.

The product of its digits is 444528, while the sum is 47.

The square root of 7867397 is about 2804.8880548072. Note that the first 3 decimals coincide. The cubic root of 7867397 is about 198.8888127480. Note that the first 4 decimals are identical.

The spelling of 7867397 in words is "seven million, eight hundred sixty-seven thousand, three hundred ninety-seven".