68937509 has 4 divisors (see below), whose sum is σ = 71934816. Its totient is φ = 65940204.

The previous prime is 68937493. The next prime is 68937527. The reversal of 68937509 is 90573986.

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 68937509 - 2⁴ = 68937493 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68937569) 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, 1498619 + ... + 1498664.

It is an arithmetic number, because the mean of its divisors is an integer number (17983704).

Almost surely, 2^68937509 is an apocalyptic number.

It is an amenable number.

68937509 is a deficient number, since it is larger than the sum of its proper divisors (2997307).

68937509 is a wasteful number, since it uses less digits than its factorization.

68937509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2997306.

The product of its (nonzero) digits is 408240, while the sum is 47.

The square root of 68937509 is about 8302.8614946896. The cubic root of 68937509 is about 410.0327338529.

The spelling of 68937509 in words is "sixty-eight million, nine hundred thirty-seven thousand, five hundred nine".