77740523 has 4 divisors (see below), whose sum is σ = 88846320. Its totient is φ = 66634728.

The previous prime is 77740511. The next prime is 77740549. The reversal of 77740523 is 32504777.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 32504777 = 47 ⋅691591.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-77740523 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (77740573) 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, 5552888 + ... + 5552901.

It is an arithmetic number, because the mean of its divisors is an integer number (22211580).

Almost surely, 2^77740523 is an apocalyptic number.

77740523 is a deficient number, since it is larger than the sum of its proper divisors (11105797).

77740523 is a wasteful number, since it uses less digits than its factorization.

77740523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11105796.

The product of its (nonzero) digits is 41160, while the sum is 35.

The square root of 77740523 is about 8817.0586365295. The cubic root of 77740523 is about 426.7915569319.

The spelling of 77740523 in words is "seventy-seven million, seven hundred forty thousand, five hundred twenty-three".