78969289 has 8 divisors (see below), whose sum is σ = 90940608. Its totient is φ = 67170480.

The previous prime is 78969287. The next prime is 78969337. The reversal of 78969289 is 98296987.

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

It is a cyclic number.

It is not a de Polignac number, because 78969289 - 2¹ = 78969287 is a prime.

It is a super-2 number, since 2×78969289² = 12472297210331042, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78969287) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 42142 + ... + 43975.

It is an arithmetic number, because the mean of its divisors is an integer number (11367576).

Almost surely, 2^78969289 is an apocalyptic number.

It is an amenable number.

78969289 is a deficient number, since it is larger than the sum of its proper divisors (11971319).

78969289 is a wasteful number, since it uses less digits than its factorization.

78969289 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86255.

The product of its digits is 3919104, while the sum is 58.

The square root of 78969289 is about 8886.4666206541. The cubic root of 78969289 is about 429.0284338082.

The spelling of 78969289 in words is "seventy-eight million, nine hundred sixty-nine thousand, two hundred eighty-nine".