68609903 has 4 divisors (see below), whose sum is σ = 68680128. Its totient is φ = 68539680.

The previous prime is 68609899. The next prime is 68609921. The reversal of 68609903 is 30990686.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 30990686 = 2 ⋅15495343.

It is a cyclic number.

It is not a de Polignac number, because 68609903 - 2² = 68609899 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 (68609953) 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, 33626 + ... + 35607.

It is an arithmetic number, because the mean of its divisors is an integer number (17170032).

Almost surely, 2^68609903 is an apocalyptic number.

68609903 is a deficient number, since it is larger than the sum of its proper divisors (70225).

68609903 is an equidigital number, since it uses as much as digits as its factorization.

68609903 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70224.

The product of its (nonzero) digits is 69984, while the sum is 41.

The square root of 68609903 is about 8283.1095006646. The cubic root of 68609903 is about 409.3821807337.

The spelling of 68609903 in words is "sixty-eight million, six hundred nine thousand, nine hundred three".