423568981 has 8 divisors (see below), whose sum is σ = 465604128. Its totient is φ = 382122000.

The previous prime is 423568973. The next prime is 423569009. The reversal of 423568981 is 189865324.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 423568981 - 2³ = 423568973 is a prime.

It is a super-2 number, since 2×423568981² = 358821363330756722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (423568781) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 145530 + ... + 148411.

It is an arithmetic number, because the mean of its divisors is an integer number (58200516).

Almost surely, 2^423568981 is an apocalyptic number.

It is an amenable number.

423568981 is a deficient number, since it is larger than the sum of its proper divisors (42035147).

423568981 is a wasteful number, since it uses less digits than its factorization.

423568981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 294083.

The product of its digits is 414720, while the sum is 46.

The square root of 423568981 is about 20580.7915542624. The cubic root of 423568981 is about 751.0024999872.

The spelling of 423568981 in words is "four hundred twenty-three million, five hundred sixty-eight thousand, nine hundred eighty-one".