372128381 has 2 divisors, whose sum is σ = 372128382. Its totient is φ = 372128380.

The previous prime is 372128369. The next prime is 372128387. The reversal of 372128381 is 183821273.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 371911225 + 217156 = 19285^2 + 466^2 .

It is an emirp because it is prime and its reverse (183821273) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-372128381 is a prime.

It is a super-2 number, since 2×372128381² = 276959063891362322, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (372128387) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 186064190 + 186064191.

It is an arithmetic number, because the mean of its divisors is an integer number (186064191).

Almost surely, 2^372128381 is an apocalyptic number.

It is an amenable number.

372128381 is a deficient number, since it is larger than the sum of its proper divisors (1).

372128381 is an equidigital number, since it uses as much as digits as its factorization.

372128381 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 16128, while the sum is 35.

The square root of 372128381 is about 19290.6293572812. The cubic root of 372128381 is about 719.2793593343.

The spelling of 372128381 in words is "three hundred seventy-two million, one hundred twenty-eight thousand, three hundred eighty-one".