83500381 has 2 divisors, whose sum is σ = 83500382. Its totient is φ = 83500380.

The previous prime is 83500369. The next prime is 83500441. The reversal of 83500381 is 18300538.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 57836025 + 25664356 = 7605^2 + 5066^2 .

It is a cyclic number.

It is not a de Polignac number, because 83500381 - 2⁷ = 83500253 is a prime.

It is a super-2 number, since 2×83500381² = 13944627254290322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (83504381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41750190 + 41750191.

It is an arithmetic number, because the mean of its divisors is an integer number (41750191).

Almost surely, 2^83500381 is an apocalyptic number.

It is an amenable number.

83500381 is a deficient number, since it is larger than the sum of its proper divisors (1).

83500381 is an equidigital number, since it uses as much as digits as its factorization.

83500381 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2880, while the sum is 28.

The square root of 83500381 is about 9137.8542886172. The cubic root of 83500381 is about 437.0818967240.

The spelling of 83500381 in words is "eighty-three million, five hundred thousand, three hundred eighty-one".