73827409 has 2 divisors, whose sum is σ = 73827410. Its totient is φ = 73827408.

The previous prime is 73827389. The next prime is 73827443. The reversal of 73827409 is 90472837.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 43191184 + 30636225 = 6572^2 + 5535^2 .

It is a cyclic number.

It is not a de Polignac number, because 73827409 - 2¹³ = 73819217 is a prime.

It is not a weakly prime, because it can be changed into another prime (73827449) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36913704 + 36913705.

It is an arithmetic number, because the mean of its divisors is an integer number (36913705).

Almost surely, 2^73827409 is an apocalyptic number.

It is an amenable number.

73827409 is a deficient number, since it is larger than the sum of its proper divisors (1).

73827409 is an equidigital number, since it uses as much as digits as its factorization.

73827409 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 84672, while the sum is 40.

The square root of 73827409 is about 8592.2877628720. The cubic root of 73827409 is about 419.5069971174.

The spelling of 73827409 in words is "seventy-three million, eight hundred twenty-seven thousand, four hundred nine".