67998449 has 2 divisors, whose sum is σ = 67998450. Its totient is φ = 67998448.

The previous prime is 67998409. The next prime is 67998461. The reversal of 67998449 is 94489976.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 66308449 + 1690000 = 8143^2 + 1300^2 .

It is a cyclic number.

It is not a de Polignac number, because 67998449 - 2¹⁶ = 67932913 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 67998394 and 67998403.

It is not a weakly prime, because it can be changed into another prime (67998409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33999224 + 33999225.

It is an arithmetic number, because the mean of its divisors is an integer number (33999225).

Almost surely, 2^67998449 is an apocalyptic number.

It is an amenable number.

67998449 is a deficient number, since it is larger than the sum of its proper divisors (1).

67998449 is an equidigital number, since it uses as much as digits as its factorization.

67998449 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3919104, while the sum is 56.

The square root of 67998449 is about 8246.1172075105. The cubic root of 67998449 is about 408.1624069098.

The spelling of 67998449 in words is "sixty-seven million, nine hundred ninety-eight thousand, four hundred forty-nine".