7974977 has 2 divisors, whose sum is σ = 7974978. Its totient is φ = 7974976.

The previous prime is 7974961. The next prime is 7974991. The reversal of 7974977 is 7794797.

It is a Cunningham number, because it is equal to 2824²+1.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7974976 + 1 = 2824^2 + 1^2 .

It is a cyclic number.

It is not a de Polignac number, because 7974977 - 2⁴ = 7974961 is a prime.

It is a Chen prime.

It is a plaindrome in base 11.

It is not a weakly prime, because it can be changed into another prime (7974917) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3987488 + 3987489.

It is an arithmetic number, because the mean of its divisors is an integer number (3987489).

Almost surely, 2^7974977 is an apocalyptic number.

It is an amenable number.

7974977 is a deficient number, since it is larger than the sum of its proper divisors (1).

7974977 is an equidigital number, since it uses as much as digits as its factorization.

7974977 is an evil number, because the sum of its binary digits is even.

The product of its digits is 777924, while the sum is 50.

The square root of 7974977 is about 2824.0001770538. Note that the first 3 decimals coincide. The cubic root of 7974977 is about 199.7912572080.

The spelling of 7974977 in words is "seven million, nine hundred seventy-four thousand, nine hundred seventy-seven".