371888921 has 2 divisors, whose sum is σ = 371888922. Its totient is φ = 371888920.

The previous prime is 371888911. The next prime is 371888929. The reversal of 371888921 is 129888173.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 250778896 + 121110025 = 15836^2 + 11005^2 .

It is a cyclic number.

It is not a de Polignac number, because 371888921 - 2¹⁴ = 371872537 is a prime.

It is not a weakly prime, because it can be changed into another prime (371888929) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 185944460 + 185944461.

It is an arithmetic number, because the mean of its divisors is an integer number (185944461).

Almost surely, 2^371888921 is an apocalyptic number.

It is an amenable number.

371888921 is a deficient number, since it is larger than the sum of its proper divisors (1).

371888921 is an equidigital number, since it uses as much as digits as its factorization.

371888921 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 193536, while the sum is 47.

The square root of 371888921 is about 19284.4217180604. The cubic root of 371888921 is about 719.1250437791.

The spelling of 371888921 in words is "three hundred seventy-one million, eight hundred eighty-eight thousand, nine hundred twenty-one".