77727023 has 4 divisors (see below), whose sum is σ = 84793128. Its totient is φ = 70660920.

The previous prime is 77727007. The next prime is 77727053. The reversal of 77727023 is 32072777.

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

It is not a de Polignac number, because 77727023 - 2⁴ = 77727007 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 (77727053) 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 3 ways as a sum of consecutive naturals, for example, 3533036 + ... + 3533057.

It is an arithmetic number, because the mean of its divisors is an integer number (21198282).

Almost surely, 2^77727023 is an apocalyptic number.

77727023 is a deficient number, since it is larger than the sum of its proper divisors (7066105).

77727023 is a wasteful number, since it uses less digits than its factorization.

77727023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7066104.

The product of its (nonzero) digits is 28812, while the sum is 35.

The square root of 77727023 is about 8816.2930418629. The cubic root of 77727023 is about 426.7668507283.

It can be divided in two parts, 777270 and 23, that multiplied together give a triangular number (17877210 = T₅₉₇₉).

The spelling of 77727023 in words is "seventy-seven million, seven hundred twenty-seven thousand, twenty-three".