77934429 has 6 divisors (see below), whose sum is σ = 112571966. Its totient is φ = 51956280.

The previous prime is 77934421. The next prime is 77934431. The reversal of 77934429 is 92443977.

It can be written as a sum of positive squares in only one way, i.e., 52229529 + 25704900 = 7227^2 + 5070^2 .

It is not a de Polignac number, because 77934429 - 2³ = 77934421 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 (77934421) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4329682 + ... + 4329699.

Almost surely, 2^77934429 is an apocalyptic number.

It is an amenable number.

77934429 is a deficient number, since it is larger than the sum of its proper divisors (34637537).

77934429 is a wasteful number, since it uses less digits than its factorization.

77934429 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8659387 (or 8659384 counting only the distinct ones).

The product of its digits is 381024, while the sum is 45.

The square root of 77934429 is about 8828.0478589550. The cubic root of 77934429 is about 427.1461070392.

The spelling of 77934429 in words is "seventy-seven million, nine hundred thirty-four thousand, four hundred twenty-nine".