3142391821 has 2 divisors, whose sum is σ = 3142391822. Its totient is φ = 3142391820.

The previous prime is 3142391731. The next prime is 3142391851. The reversal of 3142391821 is 1281932413.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3122015625 + 20376196 = 55875^2 + 4514^2 .

It is a cyclic number.

It is not a de Polignac number, because 3142391821 - 2¹⁵ = 3142359053 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3142391851) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1571195910 + 1571195911.

It is an arithmetic number, because the mean of its divisors is an integer number (1571195911).

Almost surely, 2^3142391821 is an apocalyptic number.

It is an amenable number.

3142391821 is a deficient number, since it is larger than the sum of its proper divisors (1).

3142391821 is an equidigital number, since it uses as much as digits as its factorization.

3142391821 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10368, while the sum is 34.

The square root of 3142391821 is about 56057.0407799056. The cubic root of 3142391821 is about 1464.7160660702.

The spelling of 3142391821 in words is "three billion, one hundred forty-two million, three hundred ninety-one thousand, eight hundred twenty-one".