68499481 has 2 divisors, whose sum is σ = 68499482. Its totient is φ = 68499480.

The previous prime is 68499439. The next prime is 68499499. The reversal of 68499481 is 18499486.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 59043856 + 9455625 = 7684^2 + 3075^2 .

It is a cyclic number.

It is not a de Polignac number, because 68499481 - 2¹³ = 68491289 is a prime.

It is a super-2 number, since 2×68499481² = 9384357794538722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (68499881) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34249740 + 34249741.

It is an arithmetic number, because the mean of its divisors is an integer number (34249741).

Almost surely, 2^68499481 is an apocalyptic number.

It is an amenable number.

68499481 is a deficient number, since it is larger than the sum of its proper divisors (1).

68499481 is an equidigital number, since it uses as much as digits as its factorization.

68499481 is an evil number, because the sum of its binary digits is even.

The product of its digits is 497664, while the sum is 49.

The square root of 68499481 is about 8276.4413246274. The cubic root of 68499481 is about 409.1624404823.

The spelling of 68499481 in words is "sixty-eight million, four hundred ninety-nine thousand, four hundred eighty-one".