78968987 has 8 divisors (see below), whose sum is σ = 79632192. Its totient is φ = 78309000.

The previous prime is 78968951. The next prime is 78968999. The reversal of 78968987 is 78986987.

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 78968987 - 2¹⁰ = 78967963 is a prime.

It is a super-2 number, since 2×78968987² = 12472201815612338, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78968287) 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, 74612 + ... + 75662.

It is an arithmetic number, because the mean of its divisors is an integer number (9954024).

Almost surely, 2^78968987 is an apocalyptic number.

78968987 is a deficient number, since it is larger than the sum of its proper divisors (663205).

78968987 is a wasteful number, since it uses less digits than its factorization.

78968987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1609.

The product of its digits is 12192768, while the sum is 62.

The square root of 78968987 is about 8886.4496285074. The cubic root of 78968987 is about 429.0278869004.

The spelling of 78968987 in words is "seventy-eight million, nine hundred sixty-eight thousand, nine hundred eighty-seven".