83461639 has 2 divisors, whose sum is σ = 83461640. Its totient is φ = 83461638.

The previous prime is 83461597. The next prime is 83461649. The reversal of 83461639 is 93616438.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 83461639 - 2⁹ = 83461127 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (83461649) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41730819 + 41730820.

It is an arithmetic number, because the mean of its divisors is an integer number (41730820).

Almost surely, 2^83461639 is an apocalyptic number.

83461639 is a deficient number, since it is larger than the sum of its proper divisors (1).

83461639 is an equidigital number, since it uses as much as digits as its factorization.

83461639 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 93312, while the sum is 40.

The square root of 83461639 is about 9135.7341795829. The cubic root of 83461639 is about 437.0142880648.

It can be divided in two parts, 83461 and 639, that added together give a square (84100 = 290²).

The spelling of 83461639 in words is "eighty-three million, four hundred sixty-one thousand, six hundred thirty-nine".