68751997 has 2 divisors, whose sum is σ = 68751998. Its totient is φ = 68751996.

The previous prime is 68751973. The next prime is 68752007. The reversal of 68751997 is 79915786.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 67141636 + 1610361 = 8194^2 + 1269^2 .

It is a cyclic number.

It is not a de Polignac number, because 68751997 - 2¹⁵ = 68719229 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68751967) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34375998 + 34375999.

It is an arithmetic number, because the mean of its divisors is an integer number (34375999).

Almost surely, 2^68751997 is an apocalyptic number.

It is an amenable number.

68751997 is a deficient number, since it is larger than the sum of its proper divisors (1).

68751997 is an equidigital number, since it uses as much as digits as its factorization.

68751997 is an evil number, because the sum of its binary digits is even.

The product of its digits is 952560, while the sum is 52.

The square root of 68751997 is about 8291.6823986450. The cubic root of 68751997 is about 409.6646017700.

The spelling of 68751997 in words is "sixty-eight million, seven hundred fifty-one thousand, nine hundred ninety-seven".