4293432821 has 2 divisors, whose sum is σ = 4293432822. Its totient is φ = 4293432820.

The previous prime is 4293432817. The next prime is 4293432833. The reversal of 4293432821 is 1282343924.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3376191025 + 917241796 = 58105^2 + 30286^2 .

It is a cyclic number.

It is not a de Polignac number, because 4293432821 - 2² = 4293432817 is a prime.

It is a super-3 number, since 3×4293432821³ (a number of 30 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4293435821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2146716410 + 2146716411.

It is an arithmetic number, because the mean of its divisors is an integer number (2146716411).

Almost surely, 2^4293432821 is an apocalyptic number.

It is an amenable number.

4293432821 is a deficient number, since it is larger than the sum of its proper divisors (1).

4293432821 is an equidigital number, since it uses as much as digits as its factorization.

4293432821 is an evil number, because the sum of its binary digits is even.

The product of its digits is 82944, while the sum is 38.

The square root of 4293432821 is about 65524.2918389814. The cubic root of 4293432821 is about 1625.3050720013.

The spelling of 4293432821 in words is "four billion, two hundred ninety-three million, four hundred thirty-two thousand, eight hundred twenty-one".