77230829 has 4 divisors (see below), whose sum is σ = 83171676. Its totient is φ = 71289984.

The previous prime is 77230807. The next prime is 77230831. The reversal of 77230829 is 92803277.

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

It can be written as a sum of positive squares in 2 ways, for example, as 37515625 + 39715204 = 6125^2 + 6302^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-77230829 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 77230792 and 77230801.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77230229) 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, 2970404 + ... + 2970429.

It is an arithmetic number, because the mean of its divisors is an integer number (20792919).

Almost surely, 2^77230829 is an apocalyptic number.

It is an amenable number.

77230829 is a deficient number, since it is larger than the sum of its proper divisors (5940847).

77230829 is a wasteful number, since it uses less digits than its factorization.

77230829 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5940846.

The product of its (nonzero) digits is 42336, while the sum is 38.

The square root of 77230829 is about 8788.1072478663. The cubic root of 77230829 is about 425.8567795714.

The spelling of 77230829 in words is "seventy-seven million, two hundred thirty thousand, eight hundred twenty-nine".