68137057 has 4 divisors (see below), whose sum is σ = 69154096. Its totient is φ = 67120020.

The previous prime is 68137049. The next prime is 68137073. The reversal of 68137057 is 75073186.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 75073186 = 2 ⋅37536593.

It is a cyclic number.

It is not a de Polignac number, because 68137057 - 2³ = 68137049 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68137007) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 508419 + ... + 508552.

It is an arithmetic number, because the mean of its divisors is an integer number (17288524).

Almost surely, 2^68137057 is an apocalyptic number.

68137057 is a gapful number since it is divisible by the number (67) formed by its first and last digit.

It is an amenable number.

68137057 is a deficient number, since it is larger than the sum of its proper divisors (1017039).

68137057 is a wasteful number, since it uses less digits than its factorization.

68137057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1017038.

The product of its (nonzero) digits is 35280, while the sum is 37.

The square root of 68137057 is about 8254.5173692954. The cubic root of 68137057 is about 408.4395513578.

The spelling of 68137057 in words is "sixty-eight million, one hundred thirty-seven thousand, fifty-seven".