83947513 has 8 divisors (see below), whose sum is σ = 95723208. Its totient is φ = 72931584.

The previous prime is 83947477. The next prime is 83947519. The reversal of 83947513 is 31574938.

It can be written as a sum of positive squares in 4 ways, for example, as 8048569 + 75898944 = 2837^2 + 8712^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 83947513 - 2¹⁷ = 83816441 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (83947519) 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, 189706 + ... + 190147.

It is an arithmetic number, because the mean of its divisors is an integer number (11965401).

Almost surely, 2^83947513 is an apocalyptic number.

It is an amenable number.

83947513 is a deficient number, since it is larger than the sum of its proper divisors (11775695).

83947513 is a wasteful number, since it uses less digits than its factorization.

83947513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 379883.

The product of its digits is 90720, while the sum is 40.

The square root of 83947513 is about 9162.2875418751. The cubic root of 83947513 is about 437.8606775940.

The spelling of 83947513 in words is "eighty-three million, nine hundred forty-seven thousand, five hundred thirteen".