423709551 has 6 divisors (see below), whose sum is σ = 612024920. Its totient is φ = 282473028.

The previous prime is 423709549. The next prime is 423709553. The reversal of 423709551 is 155907324.

It is an interprime number because it is at equal distance from previous prime (423709549) and next prime (423709553).

It is not a de Polignac number, because 423709551 - 2¹ = 423709549 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (423709553) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 23539411 + ... + 23539428.

Almost surely, 2^423709551 is an apocalyptic number.

423709551 is a deficient number, since it is larger than the sum of its proper divisors (188315369).

423709551 is a wasteful number, since it uses less digits than its factorization.

423709551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47078845 (or 47078842 counting only the distinct ones).

The product of its (nonzero) digits is 37800, while the sum is 36.

The square root of 423709551 is about 20584.2063485576. The cubic root of 423709551 is about 751.0855692943.

The spelling of 423709551 in words is "four hundred twenty-three million, seven hundred nine thousand, five hundred fifty-one".