7986401 has 2 divisors, whose sum is σ = 7986402. Its totient is φ = 7986400.

The previous prime is 7986389. The next prime is 7986439. The reversal of 7986401 is 1046897.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7980625 + 5776 = 2825^2 + 76^2 .

It is an emirp because it is prime and its reverse (1046897) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 7986401 - 2¹⁸ = 7724257 is a prime.

It is not a weakly prime, because it can be changed into another prime (7986001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3993200 + 3993201.

It is an arithmetic number, because the mean of its divisors is an integer number (3993201).

Almost surely, 2^7986401 is an apocalyptic number.

It is an amenable number.

7986401 is a deficient number, since it is larger than the sum of its proper divisors (1).

7986401 is an equidigital number, since it uses as much as digits as its factorization.

7986401 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12096, while the sum is 35.

The square root of 7986401 is about 2826.0221159786. The cubic root of 7986401 is about 199.8866107265.

The spelling of 7986401 in words is "seven million, nine hundred eighty-six thousand, four hundred one".