981201423 has 4 divisors (see below), whose sum is σ = 1308268568. Its totient is φ = 654134280.

The previous prime is 981201379. The next prime is 981201503. The reversal of 981201423 is 324102189.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 324102189 = 3 ⋅108034063.

It is not a de Polignac number, because 981201423 - 2⁹ = 981200911 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 (981201523) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 163533568 + ... + 163533573.

It is an arithmetic number, because the mean of its divisors is an integer number (327067142).

Almost surely, 2^981201423 is an apocalyptic number.

981201423 is a deficient number, since it is larger than the sum of its proper divisors (327067145).

981201423 is a wasteful number, since it uses less digits than its factorization.

981201423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 327067144.

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

The square root of 981201423 is about 31324.1348324259. The cubic root of 981201423 is about 993.6941272174.

The spelling of 981201423 in words is "nine hundred eighty-one million, two hundred one thousand, four hundred twenty-three".