68742637 has 4 divisors (see below), whose sum is σ = 69045696. Its totient is φ = 68439580.

The previous prime is 68742631. The next prime is 68742671. The reversal of 68742637 is 73624786.

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 68742637 - 2¹⁹ = 68218349 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 68742593 and 68742602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68742631) 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, 151189 + ... + 151642.

It is an arithmetic number, because the mean of its divisors is an integer number (17261424).

Almost surely, 2^68742637 is an apocalyptic number.

It is an amenable number.

68742637 is a deficient number, since it is larger than the sum of its proper divisors (303059).

68742637 is a wasteful number, since it uses less digits than its factorization.

68742637 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 303058.

The product of its digits is 338688, while the sum is 43.

The square root of 68742637 is about 8291.1179583938. The cubic root of 68742637 is about 409.6460101418.

The spelling of 68742637 in words is "sixty-eight million, seven hundred forty-two thousand, six hundred thirty-seven".