67678989 has 32 divisors (see below), whose sum is σ = 110336256. Its totient is φ = 36019200.

The previous prime is 67678981. The next prime is 67678991. The reversal of 67678989 is 98987676.

67678989 is an esthetic number in base 10, because in such base its adjacent digits differ by 1.

It is not a de Polignac number, because 67678989 - 2³ = 67678981 is a prime.

It is a super-3 number, since 3×67678989³ (a number of 24 digits) contains 333 as substring.

It is an alternating number because its digits alternate between even and odd.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (67678981) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 35119 + ... + 36995.

It is an arithmetic number, because the mean of its divisors is an integer number (3448008).

Almost surely, 2^67678989 is an apocalyptic number.

It is an amenable number.

67678989 is a deficient number, since it is larger than the sum of its proper divisors (42657267).

67678989 is a wasteful number, since it uses less digits than its factorization.

67678989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2005.

The product of its digits is 9144576, while the sum is 60.

The square root of 67678989 is about 8226.7240746241. The cubic root of 67678989 is about 407.5222144037.

The spelling of 67678989 in words is "sixty-seven million, six hundred seventy-eight thousand, nine hundred eighty-nine".