73839421 has 2 divisors, whose sum is σ = 73839422. Its totient is φ = 73839420.

The previous prime is 73839391. The next prime is 73839439. The reversal of 73839421 is 12493837.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 38007225 + 35832196 = 6165^2 + 5986^2 .

It is a cyclic number.

It is not a de Polignac number, because 73839421 - 2²¹ = 71742269 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (73831421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36919710 + 36919711.

It is an arithmetic number, because the mean of its divisors is an integer number (36919711).

Almost surely, 2^73839421 is an apocalyptic number.

It is an amenable number.

73839421 is a deficient number, since it is larger than the sum of its proper divisors (1).

73839421 is an equidigital number, since it uses as much as digits as its factorization.

73839421 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 36288, while the sum is 37.

The square root of 73839421 is about 8592.9867333774. The cubic root of 73839421 is about 419.5297476777.

The spelling of 73839421 in words is "seventy-three million, eight hundred thirty-nine thousand, four hundred twenty-one".