78123027 has 4 divisors (see below), whose sum is σ = 104164040. Its totient is φ = 52082016.

The previous prime is 78122987. The next prime is 78123037. The reversal of 78123027 is 72032187.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 72032187 = 3 ⋅24010729.

It is not a de Polignac number, because 78123027 - 2⁷ = 78122899 is a prime.

It is a super-2 number, since 2×78123027² = 12206414695285458, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 78122985 and 78123003.

It is not an unprimeable number, because it can be changed into a prime (78123037) 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, 13020502 + ... + 13020507.

It is an arithmetic number, because the mean of its divisors is an integer number (26041010).

Almost surely, 2^78123027 is an apocalyptic number.

78123027 is a deficient number, since it is larger than the sum of its proper divisors (26041013).

78123027 is a wasteful number, since it uses less digits than its factorization.

78123027 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26041012.

The product of its (nonzero) digits is 4704, while the sum is 30.

The square root of 78123027 is about 8838.7231543928. The cubic root of 78123027 is about 427.4903879375.

The spelling of 78123027 in words is "seventy-eight million, one hundred twenty-three thousand, twenty-seven".