7978167 has 6 divisors (see below), whose sum is σ = 11524032. Its totient is φ = 5318772.

The previous prime is 7978099. The next prime is 7978169. The reversal of 7978167 is 7618797.

It is a happy number.

It is not a de Polignac number, because 7978167 - 2¹⁰ = 7977143 is a prime.

It is a super-2 number, since 2×7978167² = 127302297359778, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7978169) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 443223 + ... + 443240.

It is an arithmetic number, because the mean of its divisors is an integer number (1920672).

Almost surely, 2^7978167 is an apocalyptic number.

7978167 is a deficient number, since it is larger than the sum of its proper divisors (3545865).

7978167 is a wasteful number, since it uses less digits than its factorization.

7978167 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 886469 (or 886466 counting only the distinct ones).

The product of its digits is 148176, while the sum is 45.

The square root of 7978167 is about 2824.5649222491. The cubic root of 7978167 is about 199.8178925681.

The spelling of 7978167 in words is "seven million, nine hundred seventy-eight thousand, one hundred sixty-seven".