423400420491 has 8 divisors (see below), whose sum is σ = 565081457664. Its totient is φ = 281993165160.

The previous prime is 423400420489. The next prime is 423400420493. The reversal of 423400420491 is 194024004324.

It is an interprime number because it is at equal distance from previous prime (423400420489) and next prime (423400420493).

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

It is not a de Polignac number, because 423400420491 - 2¹ = 423400420489 is a prime.

It is a super-3 number, since 3×423400420491³ (a number of 36 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not an unprimeable number, because it can be changed into a prime (423400420493) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 68441851 + ... + 68448036.

It is an arithmetic number, because the mean of its divisors is an integer number (70635182208).

Almost surely, 2^423400420491 is an apocalyptic number.

423400420491 is a deficient number, since it is larger than the sum of its proper divisors (141681037173).

423400420491 is a wasteful number, since it uses less digits than its factorization.

423400420491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 136890921.

The product of its (nonzero) digits is 27648, while the sum is 33.

The spelling of 423400420491 in words is "four hundred twenty-three billion, four hundred million, four hundred twenty thousand, four hundred ninety-one".