67691089 has 4 divisors (see below), whose sum is σ = 68323824. Its totient is φ = 67058356.

The previous prime is 67691087. The next prime is 67691101. The reversal of 67691089 is 98019676.

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 67691089 - 2¹ = 67691087 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (67691087) 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, 316207 + ... + 316420.

It is an arithmetic number, because the mean of its divisors is an integer number (17080956).

Almost surely, 2^67691089 is an apocalyptic number.

It is an amenable number.

67691089 is a deficient number, since it is larger than the sum of its proper divisors (632735).

67691089 is a wasteful number, since it uses less digits than its factorization.

67691089 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 632734.

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

The square root of 67691089 is about 8227.4594499153. The cubic root of 67691089 is about 407.5464992668.

The spelling of 67691089 in words is "sixty-seven million, six hundred ninety-one thousand, eighty-nine".