77909359 has 6 divisors (see below), whose sum is σ = 85636040. Its totient is φ = 70826580.

The previous prime is 77909357. The next prime is 77909387. The reversal of 77909359 is 95390977.

It is not a de Polignac number, because 77909359 - 2¹ = 77909357 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 (77909353) 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, 321819 + ... + 322060.

Almost surely, 2^77909359 is an apocalyptic number.

77909359 is a deficient number, since it is larger than the sum of its proper divisors (7726681).

77909359 is a wasteful number, since it uses less digits than its factorization.

77909359 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 643901 (or 643890 counting only the distinct ones).

The product of its (nonzero) digits is 535815, while the sum is 49.

The square root of 77909359 is about 8826.6278385349. The cubic root of 77909359 is about 427.1003005773.

The spelling of 77909359 in words is "seventy-seven million, nine hundred nine thousand, three hundred fifty-nine".