439509077 has 12 divisors (see below), whose sum is σ = 512059500. Its totient is φ = 376137216.

The previous prime is 439509073. The next prime is 439509089. The reversal of 439509077 is 770905934.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 316875601 + 122633476 = 17801^2 + 11074^2 .

It is not a de Polignac number, because 439509077 - 2² = 439509073 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 (439509071) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 26549 + ... + 39797.

It is an arithmetic number, because the mean of its divisors is an integer number (42671625).

Almost surely, 2^439509077 is an apocalyptic number.

It is an amenable number.

439509077 is a deficient number, since it is larger than the sum of its proper divisors (72550423).

439509077 is a wasteful number, since it uses less digits than its factorization.

439509077 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13940 (or 13933 counting only the distinct ones).

The product of its (nonzero) digits is 238140, while the sum is 44.

The square root of 439509077 is about 20964.4717796562. The cubic root of 439509077 is about 760.3075146365.

The spelling of 439509077 in words is "four hundred thirty-nine million, five hundred nine thousand, seventy-seven".