7971970 has 16 divisors (see below), whose sum is σ = 14405688. Its totient is φ = 3176320.

The previous prime is 7971959. The next prime is 7971973. The reversal of 7971970 is 791797.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 4870849 + 3101121 = 2207^2 + 1761^2 .

It is not an unprimeable number, because it can be changed into a prime (7971973) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1392 + ... + 4228.

Almost surely, 2^7971970 is an apocalyptic number.

7971970 is a deficient number, since it is larger than the sum of its proper divisors (6433718).

7971970 is a wasteful number, since it uses less digits than its factorization.

7971970 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3125.

The product of its (nonzero) digits is 27783, while the sum is 40.

The square root of 7971970 is about 2823.4677260419. The cubic root of 7971970 is about 199.7661433285.

The spelling of 7971970 in words is "seven million, nine hundred seventy-one thousand, nine hundred seventy".