78589873 has 4 divisors (see below), whose sum is σ = 82006848. Its totient is φ = 75172900.

The previous prime is 78589843. The next prime is 78589877. The reversal of 78589873 is 37898587.

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 78589873 - 2⁹ = 78589361 is a prime.

It is a super-2 number, since 2×78589873² = 12352736276312258, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78589877) 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, 1708453 + ... + 1708498.

It is an arithmetic number, because the mean of its divisors is an integer number (20501712).

Almost surely, 2^78589873 is an apocalyptic number.

It is an amenable number.

78589873 is a deficient number, since it is larger than the sum of its proper divisors (3416975).

78589873 is a wasteful number, since it uses less digits than its factorization.

78589873 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3416974.

The product of its digits is 3386880, while the sum is 55.

The square root of 78589873 is about 8865.0929493153. The cubic root of 78589873 is about 428.3402268250.

The spelling of 78589873 in words is "seventy-eight million, five hundred eighty-nine thousand, eight hundred seventy-three".