77042123 has 4 divisors (see below), whose sum is σ = 77080440. Its totient is φ = 77003808.

The previous prime is 77042117. The next prime is 77042179. The reversal of 77042123 is 32124077.

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

It is a cyclic number.

It is not a de Polignac number, because 77042123 - 2⁶ = 77042059 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 77042092 and 77042101.

It is not an unprimeable number, because it can be changed into a prime (77042423) 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, 15965 + ... + 20222.

It is an arithmetic number, because the mean of its divisors is an integer number (19270110).

Almost surely, 2^77042123 is an apocalyptic number.

77042123 is a deficient number, since it is larger than the sum of its proper divisors (38317).

77042123 is a wasteful number, since it uses less digits than its factorization.

77042123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38316.

The product of its (nonzero) digits is 2352, while the sum is 26.

The square root of 77042123 is about 8777.3642399071. The cubic root of 77042123 is about 425.5096501867.

The spelling of 77042123 in words is "seventy-seven million, forty-two thousand, one hundred twenty-three".