77730923 has 8 divisors (see below), whose sum is σ = 78698640. Its totient is φ = 76769280.

The previous prime is 77730901. The next prime is 77730937. The reversal of 77730923 is 32903777.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 77730923 - 2¹⁶ = 77665387 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (77730623) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27563 + ... + 30251.

It is an arithmetic number, because the mean of its divisors is an integer number (9837330).

Almost surely, 2^77730923 is an apocalyptic number.

77730923 is a deficient number, since it is larger than the sum of its proper divisors (967717).

77730923 is a wasteful number, since it uses less digits than its factorization.

77730923 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3037.

The product of its (nonzero) digits is 55566, while the sum is 38.

The square root of 77730923 is about 8816.5142204842. The cubic root of 77730923 is about 426.7739883698.

The spelling of 77730923 in words is "seventy-seven million, seven hundred thirty thousand, nine hundred twenty-three".