78994773 has 24 divisors (see below), whose sum is σ = 134053920. Its totient is φ = 44192160.

The previous prime is 78994759. The next prime is 78994777. The reversal of 78994773 is 37749987.

It is not a de Polignac number, because 78994773 - 2⁴ = 78994757 is a prime.

It is a super-2 number, since 2×78994773² = 12480348322643058, which contains 22 as substring.

It is a plaindrome in base 12.

It is a zygodrome in base 12.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78994777) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 29403 + ... + 31976.

It is an arithmetic number, because the mean of its divisors is an integer number (5585580).

Almost surely, 2^78994773 is an apocalyptic number.

It is an amenable number.

78994773 is a deficient number, since it is larger than the sum of its proper divisors (55059147).

78994773 is a wasteful number, since it uses less digits than its factorization.

78994773 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61409 (or 61406 counting only the distinct ones).

The product of its digits is 2667168, while the sum is 54.

The square root of 78994773 is about 8887.9003707287. The cubic root of 78994773 is about 429.0745791087.

The spelling of 78994773 in words is "seventy-eight million, nine hundred ninety-four thousand, seven hundred seventy-three".