68121497 has 2 divisors, whose sum is σ = 68121498. Its totient is φ = 68121496.

The previous prime is 68121467. The next prime is 68121523. The reversal of 68121497 is 79412186.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 48664576 + 19456921 = 6976^2 + 4411^2 .

It is a cyclic number.

It is not a de Polignac number, because 68121497 - 2¹⁴ = 68105113 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 68121497.

It is not a weakly prime, because it can be changed into another prime (68121407) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34060748 + 34060749.

It is an arithmetic number, because the mean of its divisors is an integer number (34060749).

Almost surely, 2^68121497 is an apocalyptic number.

It is an amenable number.

68121497 is a deficient number, since it is larger than the sum of its proper divisors (1).

68121497 is an equidigital number, since it uses as much as digits as its factorization.

68121497 is an evil number, because the sum of its binary digits is even.

The product of its digits is 24192, while the sum is 38.

The square root of 68121497 is about 8253.5748012604. The cubic root of 68121497 is about 408.4084581293.

The spelling of 68121497 in words is "sixty-eight million, one hundred twenty-one thousand, four hundred ninety-seven".