73890389 has 2 divisors, whose sum is σ = 73890390. Its totient is φ = 73890388.

The previous prime is 73890379. The next prime is 73890403. The reversal of 73890389 is 98309837.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 40424164 + 33466225 = 6358^2 + 5785^2 .

It is a cyclic number.

It is not a de Polignac number, because 73890389 - 2¹⁶ = 73824853 is a 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 (73890379) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36945194 + 36945195.

It is an arithmetic number, because the mean of its divisors is an integer number (36945195).

Almost surely, 2^73890389 is an apocalyptic number.

It is an amenable number.

73890389 is a deficient number, since it is larger than the sum of its proper divisors (1).

73890389 is an equidigital number, since it uses as much as digits as its factorization.

73890389 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 326592, while the sum is 47.

The square root of 73890389 is about 8595.9518960962. The cubic root of 73890389 is about 419.6262529228.

The spelling of 73890389 in words is "seventy-three million, eight hundred ninety thousand, three hundred eighty-nine".