78097923 has 24 divisors (see below), whose sum is σ = 119542800. Its totient is φ = 48993984.

The previous prime is 78097891. The next prime is 78097927. The reversal of 78097923 is 32979087.

It is not a de Polignac number, because 78097923 - 2⁵ = 78097891 is a prime.

It is not an unprimeable number, because it can be changed into a prime (78097927) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 25393 + ... + 28301.

It is an arithmetic number, because the mean of its divisors is an integer number (4980950).

Almost surely, 2^78097923 is an apocalyptic number.

78097923 is a deficient number, since it is larger than the sum of its proper divisors (41444877).

78097923 is a wasteful number, since it uses less digits than its factorization.

78097923 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3091 (or 3088 counting only the distinct ones).

The product of its (nonzero) digits is 190512, while the sum is 45.

The square root of 78097923 is about 8837.3029256669. The cubic root of 78097923 is about 427.4445932091. Note that the first 3 decimals are identical.

The spelling of 78097923 in words is "seventy-eight million, ninety-seven thousand, nine hundred twenty-three".