77945423 has 4 divisors (see below), whose sum is σ = 78013608. Its totient is φ = 77877240.

The previous prime is 77945401. The next prime is 77945443. The reversal of 77945423 is 32454977.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 32454977 = 127 ⋅255551.

It is a cyclic number.

It is not a de Polignac number, because 77945423 - 2⁸ = 77945167 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 (77945443) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32348 + ... + 34673.

It is an arithmetic number, because the mean of its divisors is an integer number (19503402).

Almost surely, 2^77945423 is an apocalyptic number.

77945423 is a deficient number, since it is larger than the sum of its proper divisors (68185).

77945423 is a wasteful number, since it uses less digits than its factorization.

77945423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68184.

The product of its digits is 211680, while the sum is 41.

The square root of 77945423 is about 8828.6705114643. The cubic root of 77945423 is about 427.1661915451.

The spelling of 77945423 in words is "seventy-seven million, nine hundred forty-five thousand, four hundred twenty-three".