3146430821 has 2 divisors, whose sum is σ = 3146430822. Its totient is φ = 3146430820.

The previous prime is 3146430811. The next prime is 3146430841. The reversal of 3146430821 is 1280346413.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2950010596 + 196420225 = 54314^2 + 14015^2 .

It is a cyclic number.

It is not a de Polignac number, because 3146430821 - 2¹⁴ = 3146414437 is a prime.

It is a super-2 number, since 2×3146430821² = 19800053822677468082, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3146430811) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1573215410 + 1573215411.

It is an arithmetic number, because the mean of its divisors is an integer number (1573215411).

Almost surely, 2^3146430821 is an apocalyptic number.

It is an amenable number.

3146430821 is a deficient number, since it is larger than the sum of its proper divisors (1).

3146430821 is an equidigital number, since it uses as much as digits as its factorization.

3146430821 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13824, while the sum is 32.

The square root of 3146430821 is about 56093.0550157504. The cubic root of 3146430821 is about 1465.3433436003.

The spelling of 3146430821 in words is "three billion, one hundred forty-six million, four hundred thirty thousand, eight hundred twenty-one".