19473121 has 8 divisors (see below), whose sum is σ = 19725920. Its totient is φ = 19222272.

The previous prime is 19473107. The next prime is 19473131. The reversal of 19473121 is 12137491.

19473121 is nontrivially palindromic in base 5.

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 19473121 - 2⁵ = 19473089 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 19473121.

It is not an unprimeable number, because it can be changed into a prime (19473131) 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, 31150 + ... + 31768.

It is an arithmetic number, because the mean of its divisors is an integer number (2465740).

Almost surely, 2^19473121 is an apocalyptic number.

It is an amenable number.

19473121 is a deficient number, since it is larger than the sum of its proper divisors (252799).

19473121 is a wasteful number, since it uses less digits than its factorization.

19473121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 975.

The product of its digits is 1512, while the sum is 28.

The square root of 19473121 is about 4412.8359362206. The cubic root of 19473121 is about 269.0369024796.

The spelling of 19473121 in words is "nineteen million, four hundred seventy-three thousand, one hundred twenty-one".