73890239 has 2 divisors, whose sum is σ = 73890240. Its totient is φ = 73890238.

The previous prime is 73890233. The next prime is 73890247. The reversal of 73890239 is 93209837.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 73890239 - 2⁸ = 73889983 is a prime.

It is a plaindrome in base 16.

It is a junction number, because it is equal to n+sod(n) for n = 73890196 and 73890205.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (73890233) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36945119 + 36945120.

It is an arithmetic number, because the mean of its divisors is an integer number (36945120).

Almost surely, 2^73890239 is an apocalyptic number.

73890239 is a deficient number, since it is larger than the sum of its proper divisors (1).

73890239 is an equidigital number, since it uses as much as digits as its factorization.

73890239 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 81648, while the sum is 41.

The square root of 73890239 is about 8595.9431710546. The cubic root of 73890239 is about 419.6259689708.

The spelling of 73890239 in words is "seventy-three million, eight hundred ninety thousand, two hundred thirty-nine".