6998401 has 2 divisors, whose sum is σ = 6998402. Its totient is φ = 6998400.

The previous prime is 6998393. The next prime is 6998419. The reversal of 6998401 is 1048996.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4626801 + 2371600 = 2151^2 + 1540^2 .

It is a cyclic number.

It is not a de Polignac number, because 6998401 - 2³ = 6998393 is a prime.

It is not a weakly prime, because it can be changed into another prime (6998461) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3499200 + 3499201.

It is an arithmetic number, because the mean of its divisors is an integer number (3499201).

Almost surely, 2^6998401 is an apocalyptic number.

It is an amenable number.

6998401 is a deficient number, since it is larger than the sum of its proper divisors (1).

6998401 is an equidigital number, since it uses as much as digits as its factorization.

6998401 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15552, while the sum is 37.

The square root of 6998401 is about 2645.4491112097. The cubic root of 6998401 is about 191.2785515635.

The spelling of 6998401 in words is "six million, nine hundred ninety-eight thousand, four hundred one".