77494773 has 4 divisors (see below), whose sum is σ = 103326368. Its totient is φ = 51663180.

The previous prime is 77494727. The next prime is 77494777. The reversal of 77494773 is 37749477.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 37749477 = 3 ⋅12583159.

It is not a de Polignac number, because 77494773 - 2⁶ = 77494709 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77494777) 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 3 ways as a sum of consecutive naturals, for example, 12915793 + ... + 12915798.

It is an arithmetic number, because the mean of its divisors is an integer number (25831592).

Almost surely, 2^77494773 is an apocalyptic number.

It is an amenable number.

77494773 is a deficient number, since it is larger than the sum of its proper divisors (25831595).

77494773 is a wasteful number, since it uses less digits than its factorization.

77494773 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25831594.

The product of its digits is 1037232, while the sum is 48.

The square root of 77494773 is about 8803.1115521729. Note that the first 3 decimals coincide. The cubic root of 77494773 is about 426.3413638457.

The spelling of 77494773 in words is "seventy-seven million, four hundred ninety-four thousand, seven hundred seventy-three".