68423057 has 4 divisors (see below), whose sum is σ = 68818740. Its totient is φ = 68027376.

The previous prime is 68423051. The next prime is 68423063. The reversal of 68423057 is 75032486.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (68423051) and next prime (68423063).

It can be written as a sum of positive squares in 2 ways, for example, as 58125376 + 10297681 = 7624^2 + 3209^2 .

It is a cyclic number.

It is not a de Polignac number, because 68423057 - 2⁶ = 68422993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68423051) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 197582 + ... + 197927.

It is an arithmetic number, because the mean of its divisors is an integer number (17204685).

Almost surely, 2^68423057 is an apocalyptic number.

It is an amenable number.

68423057 is a deficient number, since it is larger than the sum of its proper divisors (395683).

68423057 is a wasteful number, since it uses less digits than its factorization.

68423057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 395682.

The product of its (nonzero) digits is 40320, while the sum is 35.

The square root of 68423057 is about 8271.8230759609. The cubic root of 68423057 is about 409.0102180799.

The spelling of 68423057 in words is "sixty-eight million, four hundred twenty-three thousand, fifty-seven".