68498081 has 2 divisors, whose sum is σ = 68498082. Its totient is φ = 68498080.

The previous prime is 68498077. The next prime is 68498113. The reversal of 68498081 is 18089486.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 48427681 + 20070400 = 6959^2 + 4480^2 .

It is a cyclic number.

It is not a de Polignac number, because 68498081 - 2² = 68498077 is a prime.

It is a super-2 number, since 2×68498081² = 9383974201365122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (68498041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34249040 + 34249041.

It is an arithmetic number, because the mean of its divisors is an integer number (34249041).

Almost surely, 2^68498081 is an apocalyptic number.

It is an amenable number.

68498081 is a deficient number, since it is larger than the sum of its proper divisors (1).

68498081 is an equidigital number, since it uses as much as digits as its factorization.

68498081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 110592, while the sum is 44.

The square root of 68498081 is about 8276.3567467818. The cubic root of 68498081 is about 409.1596529609.

The spelling of 68498081 in words is "sixty-eight million, four hundred ninety-eight thousand, eighty-one".