83742409 has 2 divisors, whose sum is σ = 83742410. Its totient is φ = 83742408.

The previous prime is 83742349. The next prime is 83742467. The reversal of 83742409 is 90424738.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 52606009 + 31136400 = 7253^2 + 5580^2 .

It is a cyclic number.

It is not a de Polignac number, because 83742409 - 2⁹ = 83741897 is a prime.

It is not a weakly prime, because it can be changed into another prime (83742469) 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, 41871204 + 41871205.

It is an arithmetic number, because the mean of its divisors is an integer number (41871205).

Almost surely, 2^83742409 is an apocalyptic number.

It is an amenable number.

83742409 is a deficient number, since it is larger than the sum of its proper divisors (1).

83742409 is an equidigital number, since it uses as much as digits as its factorization.

83742409 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 48384, while the sum is 37.

The square root of 83742409 is about 9151.0878588286. The cubic root of 83742409 is about 437.5037870693.

The spelling of 83742409 in words is "eighty-three million, seven hundred forty-two thousand, four hundred nine".