68643470 has 16 divisors (see below), whose sum is σ = 141209568. Its totient is φ = 23534880.

The previous prime is 68643461. The next prime is 68643479. The reversal of 68643470 is 7434686.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (68643461) and next prime (68643479).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68643479) 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 7 ways as a sum of consecutive naturals, for example, 490241 + ... + 490380.

It is an arithmetic number, because the mean of its divisors is an integer number (8825598).

Almost surely, 2^68643470 is an apocalyptic number.

68643470 is an abundant number, since it is smaller than the sum of its proper divisors (72566098).

68643470 is a wasteful number, since it uses less digits than its factorization.

68643470 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 980635.

The product of its (nonzero) digits is 96768, while the sum is 38.

The square root of 68643470 is about 8285.1354847100. The cubic root of 68643470 is about 409.4489324739.

The spelling of 68643470 in words is "sixty-eight million, six hundred forty-three thousand, four hundred seventy".