78774123 has 8 divisors (see below), whose sum is σ = 105371136. Its totient is φ = 52346600.

The previous prime is 78774109. The next prime is 78774169. The reversal of 78774123 is 32147787.

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 78774123 - 2¹³ = 78765931 is a prime.

It is not an unprimeable number, because it can be changed into a prime (78774823) 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, 41283 + ... + 43148.

It is an arithmetic number, because the mean of its divisors is an integer number (13171392).

Almost surely, 2^78774123 is an apocalyptic number.

78774123 is a deficient number, since it is larger than the sum of its proper divisors (26597013).

78774123 is a wasteful number, since it uses less digits than its factorization.

78774123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84745.

The product of its digits is 65856, while the sum is 39.

The square root of 78774123 is about 8875.4787476507. The cubic root of 78774123 is about 428.6747062687.

The spelling of 78774123 in words is "seventy-eight million, seven hundred seventy-four thousand, one hundred twenty-three".