77112129 has 4 divisors (see below), whose sum is σ = 102816176. Its totient is φ = 51408084.

The previous prime is 77112121. The next prime is 77112143. The reversal of 77112129 is 92121177.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 77112129 - 2³ = 77112121 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 77112096 and 77112105.

It is not an unprimeable number, because it can be changed into a prime (77112121) 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, 12852019 + ... + 12852024.

It is an arithmetic number, because the mean of its divisors is an integer number (25704044).

Almost surely, 2^77112129 is an apocalyptic number.

It is an amenable number.

77112129 is a deficient number, since it is larger than the sum of its proper divisors (25704047).

77112129 is a wasteful number, since it uses less digits than its factorization.

77112129 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25704046.

The product of its digits is 1764, while the sum is 30.

The square root of 77112129 is about 8781.3512058225. The cubic root of 77112129 is about 425.6384940338.

The spelling of 77112129 in words is "seventy-seven million, one hundred twelve thousand, one hundred twenty-nine".