68727457 has 2 divisors, whose sum is σ = 68727458. Its totient is φ = 68727456.

The previous prime is 68727431. The next prime is 68727467. The reversal of 68727457 is 75472786.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 44036496 + 24690961 = 6636^2 + 4969^2 .

It is a cyclic number.

It is not a de Polignac number, because 68727457 - 2¹⁹ = 68203169 is a prime.

It is not a weakly prime, because it can be changed into another prime (68727467) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34363728 + 34363729.

It is an arithmetic number, because the mean of its divisors is an integer number (34363729).

Almost surely, 2^68727457 is an apocalyptic number.

It is an amenable number.

68727457 is a deficient number, since it is larger than the sum of its proper divisors (1).

68727457 is an equidigital number, since it uses as much as digits as its factorization.

68727457 is an evil number, because the sum of its binary digits is even.

The product of its digits is 658560, while the sum is 46.

The square root of 68727457 is about 8290.2024703864. The cubic root of 68727457 is about 409.6158547463.

The spelling of 68727457 in words is "sixty-eight million, seven hundred twenty-seven thousand, four hundred fifty-seven".