423821091 has 8 divisors (see below), whose sum is σ = 565216960. Its totient is φ = 282486312.

The previous prime is 423821071. The next prime is 423821143. The reversal of 423821091 is 190128324.

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

It is not a de Polignac number, because 423821091 - 2⁷ = 423820963 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (423821071) 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, 4620 + ... + 29478.

It is an arithmetic number, because the mean of its divisors is an integer number (70652120).

Almost surely, 2^423821091 is an apocalyptic number.

423821091 is a deficient number, since it is larger than the sum of its proper divisors (141395869).

423821091 is a wasteful number, since it uses less digits than its factorization.

423821091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30545.

The product of its (nonzero) digits is 3456, while the sum is 30.

The square root of 423821091 is about 20586.9155290442. The cubic root of 423821091 is about 751.1514703611.

The spelling of 423821091 in words is "four hundred twenty-three million, eight hundred twenty-one thousand, ninety-one".