3430072021 has 2 divisors, whose sum is σ = 3430072022. Its totient is φ = 3430072020.

The previous prime is 3430071991. The next prime is 3430072091. The reversal of 3430072021 is 1202700343.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2126500996 + 1303571025 = 46114^2 + 36105^2 .

It is a cyclic number.

It is not a de Polignac number, because 3430072021 - 2¹³ = 3430063829 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 3430071983 and 3430072001.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3430072091) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1715036010 + 1715036011.

It is an arithmetic number, because the mean of its divisors is an integer number (1715036011).

Almost surely, 2^3430072021 is an apocalyptic number.

It is an amenable number.

3430072021 is a deficient number, since it is larger than the sum of its proper divisors (1).

3430072021 is an equidigital number, since it uses as much as digits as its factorization.

3430072021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1008, while the sum is 22.

The square root of 3430072021 is about 58566.8167224410. The cubic root of 3430072021 is about 1508.1148383594.

Adding to 3430072021 its reverse (1202700343), we get a palindrome (4632772364).

The spelling of 3430072021 in words is "three billion, four hundred thirty million, seventy-two thousand, twenty-one".