68137869 has 4 divisors (see below), whose sum is σ = 90850496. Its totient is φ = 45425244.

The previous prime is 68137847. The next prime is 68137877. The reversal of 68137869 is 96873186.

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 not a de Polignac number, because 68137869 - 2²¹ = 66040717 is a prime.

It is a super-2 number, since 2×68137869² = 9285538383722322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68137879) 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, 11356309 + ... + 11356314.

It is an arithmetic number, because the mean of its divisors is an integer number (22712624).

Almost surely, 2^68137869 is an apocalyptic number.

It is an amenable number.

68137869 is a deficient number, since it is larger than the sum of its proper divisors (22712627).

68137869 is a wasteful number, since it uses less digits than its factorization.

68137869 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22712626.

The product of its digits is 435456, while the sum is 48.

The square root of 68137869 is about 8254.5665543383. The cubic root of 68137869 is about 408.4411738308.

It can be divided in two parts, 68137 and 869, that added together give a triangular number (69006 = T₃₇₁).

The spelling of 68137869 in words is "sixty-eight million, one hundred thirty-seven thousand, eight hundred sixty-nine".