77780323 has 4 divisors (see below), whose sum is σ = 78582280. Its totient is φ = 76978368.

The previous prime is 77780317. The next prime is 77780341. The reversal of 77780323 is 32308777.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-77780323 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (77780303) 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, 400833 + ... + 401026.

It is an arithmetic number, because the mean of its divisors is an integer number (19645570).

Almost surely, 2^77780323 is an apocalyptic number.

77780323 is a deficient number, since it is larger than the sum of its proper divisors (801957).

77780323 is an equidigital number, since it uses as much as digits as its factorization.

77780323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 801956.

The product of its (nonzero) digits is 49392, while the sum is 37.

The square root of 77780323 is about 8819.3153362378. The cubic root of 77780323 is about 426.8643778382.

The spelling of 77780323 in words is "seventy-seven million, seven hundred eighty thousand, three hundred twenty-three".