481609439 has 4 divisors (see below), whose sum is σ = 509939424. Its totient is φ = 453279456.

The previous prime is 481609391. The next prime is 481609451. The reversal of 481609439 is 934906184.

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

It is a cyclic number.

It is not a de Polignac number, because 481609439 - 2²⁴ = 464832223 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 481609439.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (481609939) 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, 14164967 + ... + 14165000.

It is an arithmetic number, because the mean of its divisors is an integer number (127484856).

Almost surely, 2^481609439 is an apocalyptic number.

481609439 is a deficient number, since it is larger than the sum of its proper divisors (28329985).

481609439 is a wasteful number, since it uses less digits than its factorization.

481609439 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28329984.

The product of its (nonzero) digits is 186624, while the sum is 44.

The square root of 481609439 is about 21945.6018144867. The cubic root of 481609439 is about 783.8476548486.

The spelling of 481609439 in words is "four hundred eighty-one million, six hundred nine thousand, four hundred thirty-nine".