421374917 has 4 divisors (see below), whose sum is σ = 431652396. Its totient is φ = 411097440.

The previous prime is 421374871. The next prime is 421374953. The reversal of 421374917 is 719473124.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 202749121 + 218625796 = 14239^2 + 14786^2 .

It is a cyclic number.

It is not a de Polignac number, because 421374917 - 2¹⁰ = 421373893 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 (421374977) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5138678 + ... + 5138759.

It is an arithmetic number, because the mean of its divisors is an integer number (107913099).

Almost surely, 2^421374917 is an apocalyptic number.

It is an amenable number.

421374917 is a deficient number, since it is larger than the sum of its proper divisors (10277479).

421374917 is a wasteful number, since it uses less digits than its factorization.

421374917 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10277478.

The product of its digits is 42336, while the sum is 38.

The square root of 421374917 is about 20527.4186638262. The cubic root of 421374917 is about 749.7035373472.

The spelling of 421374917 in words is "four hundred twenty-one million, three hundred seventy-four thousand, nine hundred seventeen".