78061923 has 6 divisors (see below), whose sum is σ = 112756124. Its totient is φ = 52041276.

The previous prime is 78061859. The next prime is 78061961. The reversal of 78061923 is 32916087.

It is not a de Polignac number, because 78061923 - 2⁶ = 78061859 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78061223) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4336765 + ... + 4336782.

Almost surely, 2^78061923 is an apocalyptic number.

78061923 is a deficient number, since it is larger than the sum of its proper divisors (34694201).

78061923 is a wasteful number, since it uses less digits than its factorization.

78061923 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8673553 (or 8673550 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 36.

The square root of 78061923 is about 8835.2658703629. The cubic root of 78061923 is about 427.3789048622.

The spelling of 78061923 in words is "seventy-eight million, sixty-one thousand, nine hundred twenty-three".