67891906 has 8 divisors (see below), whose sum is σ = 106265664. Its totient is φ = 32470020.

The previous prime is 67891903. The next prime is 67891907. The reversal of 67891906 is 60919876.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Harshad number since it is a multiple of its sum of digits (46), and also a Moran number because the ratio is a prime number: 1475911 = 67891906 / (6 + 7 + 8 + 9 + 1 + 9 + 0 + 6).

It is not an unprimeable number, because it can be changed into a prime (67891903) 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, 737910 + ... + 738001.

It is an arithmetic number, because the mean of its divisors is an integer number (13283208).

Almost surely, 2^67891906 is an apocalyptic number.

67891906 is a deficient number, since it is larger than the sum of its proper divisors (38373758).

67891906 is a wasteful number, since it uses less digits than its factorization.

67891906 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1475936.

The product of its (nonzero) digits is 163296, while the sum is 46.

The square root of 67891906 is about 8239.6544830472. The cubic root of 67891906 is about 407.9491197926.

The spelling of 67891906 in words is "sixty-seven million, eight hundred ninety-one thousand, nine hundred six".