423683551 has 2 divisors, whose sum is σ = 423683552. Its totient is φ = 423683550.

The previous prime is 423683549. The next prime is 423683573. The reversal of 423683551 is 155386324.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 423683551 - 2¹ = 423683549 is a prime.

Together with 423683549, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 423683551.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (423683581) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 211841775 + 211841776.

It is an arithmetic number, because the mean of its divisors is an integer number (211841776).

Almost surely, 2^423683551 is an apocalyptic number.

423683551 is a deficient number, since it is larger than the sum of its proper divisors (1).

423683551 is an equidigital number, since it uses as much as digits as its factorization.

423683551 is an evil number, because the sum of its binary digits is even.

The product of its digits is 86400, while the sum is 37.

The square root of 423683551 is about 20583.5747867080. The cubic root of 423683551 is about 751.0702060782.

The spelling of 423683551 in words is "four hundred twenty-three million, six hundred eighty-three thousand, five hundred fifty-one".