3135189821 has 2 divisors, whose sum is σ = 3135189822. Its totient is φ = 3135189820.

The previous prime is 3135189809. The next prime is 3135189881. The reversal of 3135189821 is 1289815313.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2943062500 + 192127321 = 54250^2 + 13861^2 .

It is a cyclic number.

It is not a de Polignac number, because 3135189821 - 2²⁶ = 3068080957 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3135189881) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1567594910 + 1567594911.

It is an arithmetic number, because the mean of its divisors is an integer number (1567594911).

Almost surely, 2^3135189821 is an apocalyptic number.

It is an amenable number.

3135189821 is a deficient number, since it is larger than the sum of its proper divisors (1).

3135189821 is an equidigital number, since it uses as much as digits as its factorization.

3135189821 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 51840, while the sum is 41.

The square root of 3135189821 is about 55992.7657916628. The cubic root of 3135189821 is about 1463.5962232955.

The spelling of 3135189821 in words is "three billion, one hundred thirty-five million, one hundred eighty-nine thousand, eight hundred twenty-one".