80213409 has 10 divisors (see below), whose sum is σ = 119825090. Its totient is φ = 53475552.

The previous prime is 80213407. The next prime is 80213411. The reversal of 80213409 is 90431208.

It is an interprime number because it is at equal distance from previous prime (80213407) and next prime (80213411).

It can be written as a sum of positive squares in only one way, i.e., 60606225 + 19607184 = 7785^2 + 4428^2 .

It is not a de Polignac number, because 80213409 - 2¹ = 80213407 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (80213407) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 495064 + ... + 495225.

It is an arithmetic number, because the mean of its divisors is an integer number (11982509).

Almost surely, 2^80213409 is an apocalyptic number.

It is an amenable number.

80213409 is a deficient number, since it is larger than the sum of its proper divisors (39611681).

80213409 is an equidigital number, since it uses as much as digits as its factorization.

80213409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 990301 (or 990292 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

The square root of 80213409 is about 8956.1938902639. The cubic root of 80213409 is about 431.2697442756.

The spelling of 80213409 in words is "eighty million, two hundred thirteen thousand, four hundred nine".