83904649 has 2 divisors, whose sum is σ = 83904650. Its totient is φ = 83904648.

The previous prime is 83904637. The next prime is 83904677. The reversal of 83904649 is 94640938.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 83393424 + 511225 = 9132^2 + 715^2 .

It is a cyclic number.

It is not a de Polignac number, because 83904649 - 2¹⁵ = 83871881 is a prime.

It is not a weakly prime, because it can be changed into another prime (83904619) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41952324 + 41952325.

It is an arithmetic number, because the mean of its divisors is an integer number (41952325).

Almost surely, 2^83904649 is an apocalyptic number.

It is an amenable number.

83904649 is a deficient number, since it is larger than the sum of its proper divisors (1).

83904649 is an equidigital number, since it uses as much as digits as its factorization.

83904649 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 186624, while the sum is 43.

The square root of 83904649 is about 9159.9480893726. The cubic root of 83904649 is about 437.7861403236.

The spelling of 83904649 in words is "eighty-three million, nine hundred four thousand, six hundred forty-nine".