83249657 has 4 divisors (see below), whose sum is σ = 83288436. Its totient is φ = 83210880.

The previous prime is 83249641. The next prime is 83249669. The reversal of 83249657 is 75694238.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 75694238 = 2 ⋅37847119.

It can be written as a sum of positive squares in 2 ways, for example, as 72777961 + 10471696 = 8531^2 + 3236^2 .

It is not a de Polignac number, because 83249657 - 2⁴ = 83249641 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (83249687) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15968 + ... + 20529.

It is an arithmetic number, because the mean of its divisors is an integer number (20822109).

Almost surely, 2^83249657 is an apocalyptic number.

It is an amenable number.

83249657 is a deficient number, since it is larger than the sum of its proper divisors (38779).

83249657 is a wasteful number, since it uses less digits than its factorization.

83249657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38778.

The product of its digits is 362880, while the sum is 44.

The square root of 83249657 is about 9124.1249991438. The cubic root of 83249657 is about 436.6439873879.

The spelling of 83249657 in words is "eighty-three million, two hundred forty-nine thousand, six hundred fifty-seven".