67898549 has 2 divisors, whose sum is σ = 67898550. Its totient is φ = 67898548.

The previous prime is 67898543. The next prime is 67898573. The reversal of 67898549 is 94589876.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 67732900 + 165649 = 8230^2 + 407^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-67898549 is a prime.

It is a super-2 number, since 2×67898549² = 9220425912610802, which contains 22 as substring.

It is an alternating number because its digits alternate between even and odd.

It is a junction number, because it is equal to n+sod(n) for n = 67898494 and 67898503.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (67898543) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33949274 + 33949275.

It is an arithmetic number, because the mean of its divisors is an integer number (33949275).

Almost surely, 2^67898549 is an apocalyptic number.

It is an amenable number.

67898549 is a deficient number, since it is larger than the sum of its proper divisors (1).

67898549 is an equidigital number, since it uses as much as digits as its factorization.

67898549 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4354560, while the sum is 56.

The square root of 67898549 is about 8240.0575847502. The cubic root of 67898549 is about 407.9624248524.

The spelling of 67898549 in words is "sixty-seven million, eight hundred ninety-eight thousand, five hundred forty-nine".