68154973 has 2 divisors, whose sum is σ = 68154974. Its totient is φ = 68154972.

The previous prime is 68154967. The next prime is 68155001. The reversal of 68154973 is 37945186.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 38962564 + 29192409 = 6242^2 + 5403^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-68154973 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68154953) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34077486 + 34077487.

It is an arithmetic number, because the mean of its divisors is an integer number (34077487).

Almost surely, 2^68154973 is an apocalyptic number.

It is an amenable number.

68154973 is a deficient number, since it is larger than the sum of its proper divisors (1).

68154973 is an equidigital number, since it uses as much as digits as its factorization.

68154973 is an evil number, because the sum of its binary digits is even.

The product of its digits is 181440, while the sum is 43.

The square root of 68154973 is about 8255.6025219241. The cubic root of 68154973 is about 408.4753466702.

The spelling of 68154973 in words is "sixty-eight million, one hundred fifty-four thousand, nine hundred seventy-three".