68971228937 has 4 divisors (see below), whose sum is σ = 74276708100. Its totient is φ = 63665749776.

The previous prime is 68971228897. The next prime is 68971228993. The reversal of 68971228937 is 73982217986.

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

It can be written as a sum of positive squares in 2 ways, for example, as 29797319161 + 39173909776 = 172619^2 + 197924^2 .

It is a cyclic number.

It is not a de Polignac number, because 68971228937 - 2³⁰ = 67897487113 is a prime.

It is a super-2 number, since 2×68971228937² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 68971228937.

It is not an unprimeable number, because it can be changed into a prime (68971248937) 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, 2652739562 + ... + 2652739587.

It is an arithmetic number, because the mean of its divisors is an integer number (18569177025).

Almost surely, 2^68971228937 is an apocalyptic number.

It is an amenable number.

68971228937 is a deficient number, since it is larger than the sum of its proper divisors (5305479163).

68971228937 is a wasteful number, since it uses less digits than its factorization.

68971228937 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5305479162.

The product of its digits is 18289152, while the sum is 62.

The spelling of 68971228937 in words is "sixty-eight billion, nine hundred seventy-one million, two hundred twenty-eight thousand, nine hundred thirty-seven".