423970289 has 2 divisors, whose sum is σ = 423970290. Its totient is φ = 423970288.

The previous prime is 423970249. The next prime is 423970301. The reversal of 423970289 is 982079324.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 381616225 + 42354064 = 19535^2 + 6508^2 .

It is a cyclic number.

It is not a de Polignac number, because 423970289 - 2¹⁶ = 423904753 is a prime.

It is not a weakly prime, because it can be changed into another prime (423970249) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 211985144 + 211985145.

It is an arithmetic number, because the mean of its divisors is an integer number (211985145).

Almost surely, 2^423970289 is an apocalyptic number.

It is an amenable number.

423970289 is a deficient number, since it is larger than the sum of its proper divisors (1).

423970289 is an equidigital number, since it uses as much as digits as its factorization.

423970289 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 217728, while the sum is 44.

The square root of 423970289 is about 20590.5388224786. The cubic root of 423970289 is about 751.2396027919.

The spelling of 423970289 in words is "four hundred twenty-three million, nine hundred seventy thousand, two hundred eighty-nine".