3722431421 has 2 divisors, whose sum is σ = 3722431422. Its totient is φ = 3722431420.

The previous prime is 3722431409. The next prime is 3722431477. The reversal of 3722431421 is 1241342273.

3722431421 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3670663396 + 51768025 = 60586^2 + 7195^2 .

It is a cyclic number.

It is not a de Polignac number, because 3722431421 - 2²⁶ = 3655322557 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3722431621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1861215710 + 1861215711.

It is an arithmetic number, because the mean of its divisors is an integer number (1861215711).

Almost surely, 2^3722431421 is an apocalyptic number.

It is an amenable number.

3722431421 is a deficient number, since it is larger than the sum of its proper divisors (1).

3722431421 is an equidigital number, since it uses as much as digits as its factorization.

3722431421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8064, while the sum is 29.

The square root of 3722431421 is about 61011.7318308536. The cubic root of 3722431421 is about 1549.7996856639.

Adding to 3722431421 its reverse (1241342273), we get a palindrome (4963773694).

The spelling of 3722431421 in words is "three billion, seven hundred twenty-two million, four hundred thirty-one thousand, four hundred twenty-one".