2381746321 has 2 divisors, whose sum is σ = 2381746322. Its totient is φ = 2381746320.

The previous prime is 2381746243. The next prime is 2381746343. The reversal of 2381746321 is 1236471832.

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., 1645438096 + 736308225 = 40564^2 + 27135^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2381746321 is a prime.

It is not a weakly prime, because it can be changed into another prime (2381746361) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1190873160 + 1190873161.

It is an arithmetic number, because the mean of its divisors is an integer number (1190873161).

Almost surely, 2^2381746321 is an apocalyptic number.

It is an amenable number.

2381746321 is a deficient number, since it is larger than the sum of its proper divisors (1).

2381746321 is an equidigital number, since it uses as much as digits as its factorization.

2381746321 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 48384, while the sum is 37.

The square root of 2381746321 is about 48803.1384339163. The cubic root of 2381746321 is about 1335.4629209081.

The spelling of 2381746321 in words is "two billion, three hundred eighty-one million, seven hundred forty-six thousand, three hundred twenty-one".