77880773 has 4 divisors (see below), whose sum is σ = 80393088. Its totient is φ = 75368460.

The previous prime is 77880769. The next prime is 77880799. The reversal of 77880773 is 37708877.

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: 37708877 = 109 ⋅345953.

It is a cyclic number.

It is not a de Polignac number, because 77880773 - 2² = 77880769 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77880763) 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 3 ways as a sum of consecutive naturals, for example, 1256111 + ... + 1256172.

It is an arithmetic number, because the mean of its divisors is an integer number (20098272).

Almost surely, 2^77880773 is an apocalyptic number.

It is an amenable number.

77880773 is a deficient number, since it is larger than the sum of its proper divisors (2512315).

77880773 is a wasteful number, since it uses less digits than its factorization.

77880773 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2512314.

The product of its (nonzero) digits is 460992, while the sum is 47.

The square root of 77880773 is about 8825.0083852651. The cubic root of 77880773 is about 427.0480578905.

The spelling of 77880773 in words is "seventy-seven million, eight hundred eighty thousand, seven hundred seventy-three".