423780983 has 2 divisors, whose sum is σ = 423780984. Its totient is φ = 423780982.

The previous prime is 423780979. The next prime is 423781109. The reversal of 423780983 is 389087324.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 423780983 - 2² = 423780979 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (423780283) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 211890491 + 211890492.

It is an arithmetic number, because the mean of its divisors is an integer number (211890492).

Almost surely, 2^423780983 is an apocalyptic number.

423780983 is a deficient number, since it is larger than the sum of its proper divisors (1).

423780983 is an equidigital number, since it uses as much as digits as its factorization.

423780983 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 290304, while the sum is 44.

The square root of 423780983 is about 20585.9413921249. The cubic root of 423780983 is about 751.1277747230.

The spelling of 423780983 in words is "four hundred twenty-three million, seven hundred eighty thousand, nine hundred eighty-three".