68646473 has 4 divisors (see below), whose sum is σ = 78453120. Its totient is φ = 58839828.

The previous prime is 68646469. The next prime is 68646511. The reversal of 68646473 is 37464686.

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 68646473 - 2² = 68646469 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68646463) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4903313 + ... + 4903326.

It is an arithmetic number, because the mean of its divisors is an integer number (19613280).

Almost surely, 2^68646473 is an apocalyptic number.

It is an amenable number.

68646473 is a deficient number, since it is larger than the sum of its proper divisors (9806647).

68646473 is an equidigital number, since it uses as much as digits as its factorization.

68646473 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9806646.

The product of its digits is 580608, while the sum is 44.

The square root of 68646473 is about 8285.3167109049. The cubic root of 68646473 is about 409.4549032152.

The spelling of 68646473 in words is "sixty-eight million, six hundred forty-six thousand, four hundred seventy-three".