7986457 has 2 divisors, whose sum is σ = 7986458. Its totient is φ = 7986456.

The previous prime is 7986439. The next prime is 7986463. The reversal of 7986457 is 7546897.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7778521 + 207936 = 2789^2 + 456^2 .

It is a cyclic number.

It is not a de Polignac number, because 7986457 - 2¹¹ = 7984409 is a prime.

It is not a weakly prime, because it can be changed into another prime (7986557) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3993228 + 3993229.

It is an arithmetic number, because the mean of its divisors is an integer number (3993229).

Almost surely, 2^7986457 is an apocalyptic number.

It is an amenable number.

7986457 is a deficient number, since it is larger than the sum of its proper divisors (1).

7986457 is an equidigital number, since it uses as much as digits as its factorization.

7986457 is an evil number, because the sum of its binary digits is even.

The product of its digits is 423360, while the sum is 46.

The square root of 7986457 is about 2826.0320238808. The cubic root of 7986457 is about 199.8870779217.

The spelling of 7986457 in words is "seven million, nine hundred eighty-six thousand, four hundred fifty-seven".