78089123 has 4 divisors (see below), whose sum is σ = 89244720. Its totient is φ = 66933528.

The previous prime is 78089101. The next prime is 78089149. The reversal of 78089123 is 32198087.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 32198087 = 229 ⋅140603.

It is a cyclic number.

It is not a de Polignac number, because 78089123 - 2¹⁶ = 78023587 is a prime.

It is a super-2 number, since 2×78089123² = 12195822261818258, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78089423) 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, 5577788 + ... + 5577801.

It is an arithmetic number, because the mean of its divisors is an integer number (22311180).

Almost surely, 2^78089123 is an apocalyptic number.

78089123 is a deficient number, since it is larger than the sum of its proper divisors (11155597).

78089123 is a wasteful number, since it uses less digits than its factorization.

78089123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11155596.

The product of its (nonzero) digits is 24192, while the sum is 38.

The square root of 78089123 is about 8836.8050221785. The cubic root of 78089123 is about 427.4285379221.

The spelling of 78089123 in words is "seventy-eight million, eighty-nine thousand, one hundred twenty-three".