73542839 has 2 divisors, whose sum is σ = 73542840. Its totient is φ = 73542838.

The previous prime is 73542817. The next prime is 73542841. The reversal of 73542839 is 93824537.

It is a strong prime.

It is an emirp because it is prime and its reverse (93824537) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 73542839 - 2⁸ = 73542583 is a prime.

Together with 73542841, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 73542796 and 73542805.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (73542239) 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, 36771419 + 36771420.

It is an arithmetic number, because the mean of its divisors is an integer number (36771420).

Almost surely, 2^73542839 is an apocalyptic number.

73542839 is a deficient number, since it is larger than the sum of its proper divisors (1).

73542839 is an equidigital number, since it uses as much as digits as its factorization.

73542839 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 181440, while the sum is 41.

The square root of 73542839 is about 8575.7121570165. The cubic root of 73542839 is about 418.9673022598.

The spelling of 73542839 in words is "seventy-three million, five hundred forty-two thousand, eight hundred thirty-nine".