83427409 has 8 divisors (see below), whose sum is σ = 90058472. Its totient is φ = 76826880.

The previous prime is 83427361. The next prime is 83427413. The reversal of 83427409 is 90472438.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 253009 + 83174400 = 503^2 + 9120^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 83427409 - 2²³ = 75038801 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (83427709) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1782 + ... + 13039.

It is an arithmetic number, because the mean of its divisors is an integer number (11257309).

Almost surely, 2^83427409 is an apocalyptic number.

It is an amenable number.

83427409 is a deficient number, since it is larger than the sum of its proper divisors (6631063).

83427409 is a wasteful number, since it uses less digits than its factorization.

83427409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15267.

The product of its (nonzero) digits is 48384, while the sum is 37.

The square root of 83427409 is about 9133.8605748063. The cubic root of 83427409 is about 436.9545358850.

It can be divided in two parts, 8342 and 7409, that added together give a palindrome (15751).

The spelling of 83427409 in words is "eighty-three million, four hundred twenty-seven thousand, four hundred nine".