83561039 has 2 divisors, whose sum is σ = 83561040. Its totient is φ = 83561038.

The previous prime is 83561021. The next prime is 83561053. The reversal of 83561039 is 93016538.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 83561039 - 2¹² = 83556943 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (83561339) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41780519 + 41780520.

It is an arithmetic number, because the mean of its divisors is an integer number (41780520).

Almost surely, 2^83561039 is an apocalyptic number.

83561039 is a deficient number, since it is larger than the sum of its proper divisors (1).

83561039 is an equidigital number, since it uses as much as digits as its factorization.

83561039 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 19440, while the sum is 35.

The square root of 83561039 is about 9141.1727365804. The cubic root of 83561039 is about 437.1877090012.

The spelling of 83561039 in words is "eighty-three million, five hundred sixty-one thousand, thirty-nine".