72842039 has 2 divisors, whose sum is σ = 72842040. Its totient is φ = 72842038.

The previous prime is 72842027. The next prime is 72842083. The reversal of 72842039 is 93024827.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 72842039 - 2¹² = 72837943 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 (72842239) 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, 36421019 + 36421020.

It is an arithmetic number, because the mean of its divisors is an integer number (36421020).

Almost surely, 2^72842039 is an apocalyptic number.

72842039 is a deficient number, since it is larger than the sum of its proper divisors (1).

72842039 is an equidigital number, since it uses as much as digits as its factorization.

72842039 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 24192, while the sum is 35.

The square root of 72842039 is about 8534.7547709351. The cubic root of 72842039 is about 417.6322532713.

The spelling of 72842039 in words is "seventy-two million, eight hundred forty-two thousand, thirty-nine".