847416421 has 4 divisors (see below), whose sum is σ = 847479744. Its totient is φ = 847353100.

The previous prime is 847416407. The next prime is 847416431. The reversal of 847416421 is 124614748.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 847416421 - 2⁷ = 847416293 is a prime.

It is a super-2 number, since 2×847416421² = 1436229181160898482, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (847416431) 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, 2845 + ... + 41266.

It is an arithmetic number, because the mean of its divisors is an integer number (211869936).

Almost surely, 2^847416421 is an apocalyptic number.

It is an amenable number.

847416421 is a deficient number, since it is larger than the sum of its proper divisors (63323).

847416421 is a wasteful number, since it uses less digits than its factorization.

847416421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63322.

The product of its digits is 43008, while the sum is 37.

The square root of 847416421 is about 29110.4177400463. The cubic root of 847416421 is about 946.3075210722.

The spelling of 847416421 in words is "eight hundred forty-seven million, four hundred sixteen thousand, four hundred twenty-one".