78118723 has 6 divisors (see below), whose sum is σ = 82984556. Its totient is φ = 73523232.

The previous prime is 78118679. The next prime is 78118727. The reversal of 78118723 is 32781187.

It is not a de Polignac number, because 78118723 - 2¹³ = 78110531 is a prime.

It is a super-2 number, since 2×78118723² = 12205069766301458, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78118727) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 134865 + ... + 135442.

Almost surely, 2^78118723 is an apocalyptic number.

78118723 is a deficient number, since it is larger than the sum of its proper divisors (4865833).

78118723 is a wasteful number, since it uses less digits than its factorization.

78118723 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 270341 (or 270324 counting only the distinct ones).

The product of its digits is 18816, while the sum is 37.

The square root of 78118723 is about 8838.4796769580. The cubic root of 78118723 is about 427.4825372756.

The spelling of 78118723 in words is "seventy-eight million, one hundred eighteen thousand, seven hundred twenty-three".