82513389 has 8 divisors (see below), whose sum is σ = 125734720. Its totient is φ = 47150496.

The previous prime is 82513349. The next prime is 82513399. The reversal of 82513389 is 98331528.

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

It is not a de Polignac number, because 82513389 - 2¹² = 82509293 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 (82513349) 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, 1964584 + ... + 1964625.

It is an arithmetic number, because the mean of its divisors is an integer number (15716840).

Almost surely, 2^82513389 is an apocalyptic number.

It is an amenable number.

82513389 is a deficient number, since it is larger than the sum of its proper divisors (43221331).

82513389 is a wasteful number, since it uses less digits than its factorization.

82513389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3929219.

The product of its digits is 51840, while the sum is 39.

The square root of 82513389 is about 9083.6880725837. The cubic root of 82513389 is about 435.3529332853.

The spelling of 82513389 in words is "eighty-two million, five hundred thirteen thousand, three hundred eighty-nine".