68043637 has 4 divisors (see below), whose sum is σ = 71002080. Its totient is φ = 65085196.

The previous prime is 68043607. The next prime is 68043709. The reversal of 68043637 is 73634086.

It is a happy number.

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 68043637 - 2⁷ = 68043509 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 68043596 and 68043605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68043607) 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, 1479187 + ... + 1479232.

It is an arithmetic number, because the mean of its divisors is an integer number (17750520).

Almost surely, 2^68043637 is an apocalyptic number.

It is an amenable number.

68043637 is a deficient number, since it is larger than the sum of its proper divisors (2958443).

68043637 is a wasteful number, since it uses less digits than its factorization.

68043637 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2958442.

The product of its (nonzero) digits is 72576, while the sum is 37.

The square root of 68043637 is about 8248.8567086597. The cubic root of 68043637 is about 408.2528009261.

The spelling of 68043637 in words is "sixty-eight million, forty-three thousand, six hundred thirty-seven".