83638757 has 2 divisors, whose sum is σ = 83638758. Its totient is φ = 83638756.

The previous prime is 83638739. The next prime is 83638829. The reversal of 83638757 is 75783638.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 78251716 + 5387041 = 8846^2 + 2321^2 .

It is a cyclic number.

It is not a de Polignac number, because 83638757 - 2⁶ = 83638693 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (83638727) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41819378 + 41819379.

It is an arithmetic number, because the mean of its divisors is an integer number (41819379).

Almost surely, 2^83638757 is an apocalyptic number.

It is an amenable number.

83638757 is a deficient number, since it is larger than the sum of its proper divisors (1).

83638757 is an equidigital number, since it uses as much as digits as its factorization.

83638757 is an evil number, because the sum of its binary digits is even.

The product of its digits is 846720, while the sum is 47.

The square root of 83638757 is about 9145.4227348986. The cubic root of 83638757 is about 437.3232060637.

It can be divided in two parts, 836 and 38757, that added together give a palindrome (39593).

The spelling of 83638757 in words is "eighty-three million, six hundred thirty-eight thousand, seven hundred fifty-seven".