83749657 has 4 divisors (see below), whose sum is σ = 84125440. Its totient is φ = 83373876.

The previous prime is 83749643. The next prime is 83749661. The reversal of 83749657 is 75694738.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 83749657 - 2¹⁹ = 83225369 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 83749657.

It is not an unprimeable number, because it can be changed into a prime (83749357) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 187557 + ... + 188002.

It is an arithmetic number, because the mean of its divisors is an integer number (21031360).

Almost surely, 2^83749657 is an apocalyptic number.

It is an amenable number.

83749657 is a deficient number, since it is larger than the sum of its proper divisors (375783).

83749657 is a wasteful number, since it uses less digits than its factorization.

83749657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 375782.

The product of its digits is 1270080, while the sum is 49.

The square root of 83749657 is about 9151.4838687505. The cubic root of 83749657 is about 437.5164088540.

The spelling of 83749657 in words is "eighty-three million, seven hundred forty-nine thousand, six hundred fifty-seven".