83309257 has 8 divisors (see below), whose sum is σ = 86495040. Its totient is φ = 80144400.

The previous prime is 83309249. The next prime is 83309273. The reversal of 83309257 is 75290338.

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

It is not a de Polignac number, because 83309257 - 2³ = 83309249 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (83309287) 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, 3132 + ... + 13282.

It is an arithmetic number, because the mean of its divisors is an integer number (10811880).

Almost surely, 2^83309257 is an apocalyptic number.

It is an amenable number.

83309257 is a deficient number, since it is larger than the sum of its proper divisors (3185783).

83309257 is a wasteful number, since it uses less digits than its factorization.

83309257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10463.

The product of its (nonzero) digits is 45360, while the sum is 37.

The square root of 83309257 is about 9127.3904814027. The cubic root of 83309257 is about 436.7481630875.

The spelling of 83309257 in words is "eighty-three million, three hundred nine thousand, two hundred fifty-seven".