68113537 has 4 divisors (see below), whose sum is σ = 71698480. Its totient is φ = 64528596.

The previous prime is 68113519. The next prime is 68113561. The reversal of 68113537 is 73531186.

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.

It is a cyclic number.

It is not a de Polignac number, because 68113537 - 2¹¹ = 68111489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68113517) 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, 1792443 + ... + 1792480.

It is an arithmetic number, because the mean of its divisors is an integer number (17924620).

Almost surely, 2^68113537 is an apocalyptic number.

It is an amenable number.

68113537 is a deficient number, since it is larger than the sum of its proper divisors (3584943).

68113537 is a wasteful number, since it uses less digits than its factorization.

68113537 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3584942.

The product of its digits is 15120, while the sum is 34.

The square root of 68113537 is about 8253.0925718787. The cubic root of 68113537 is about 408.3925499940.

The spelling of 68113537 in words is "sixty-eight million, one hundred thirteen thousand, five hundred thirty-seven".