68680693 has 4 divisors (see below), whose sum is σ = 69806668. Its totient is φ = 67554720.

The previous prime is 68680681. The next prime is 68680721. The reversal of 68680693 is 39608686.

It is a happy number.

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 15944049 + 52736644 = 3993^2 + 7262^2 .

It is a cyclic number.

It is not a de Polignac number, because 68680693 - 2⁹ = 68680181 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 (68650693) 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, 562896 + ... + 563017.

It is an arithmetic number, because the mean of its divisors is an integer number (17451667).

Almost surely, 2^68680693 is an apocalyptic number.

It is an amenable number.

68680693 is a deficient number, since it is larger than the sum of its proper divisors (1125975).

68680693 is a wasteful number, since it uses less digits than its factorization.

68680693 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1125974.

The product of its (nonzero) digits is 373248, while the sum is 46.

The square root of 68680693 is about 8287.3815526981. The cubic root of 68680693 is about 409.5229291389.

The spelling of 68680693 in words is "sixty-eight million, six hundred eighty thousand, six hundred ninety-three".