83621029 has 2 divisors, whose sum is σ = 83621030. Its totient is φ = 83621028.

The previous prime is 83620993. The next prime is 83621051. The reversal of 83621029 is 92012638.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 54730404 + 28890625 = 7398^2 + 5375^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-83621029 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (83621129) 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 as a sum of consecutive naturals, namely, 41810514 + 41810515.

It is an arithmetic number, because the mean of its divisors is an integer number (41810515).

Almost surely, 2^83621029 is an apocalyptic number.

It is an amenable number.

83621029 is a deficient number, since it is larger than the sum of its proper divisors (1).

83621029 is an equidigital number, since it uses as much as digits as its factorization.

83621029 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5184, while the sum is 31.

The square root of 83621029 is about 9144.4534555106. The cubic root of 83621029 is about 437.2923056618.

The spelling of 83621029 in words is "eighty-three million, six hundred twenty-one thousand, twenty-nine".