381298789 has 2 divisors, whose sum is σ = 381298790. Its totient is φ = 381298788.

The previous prime is 381298777. The next prime is 381298837. The reversal of 381298789 is 987892183.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 207849889 + 173448900 = 14417^2 + 13170^2 .

It is an emirp because it is prime and its reverse (987892183) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 381298789 - 2⁹ = 381298277 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (381298889) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 190649394 + 190649395.

It is an arithmetic number, because the mean of its divisors is an integer number (190649395).

Almost surely, 2^381298789 is an apocalyptic number.

It is an amenable number.

381298789 is a deficient number, since it is larger than the sum of its proper divisors (1).

381298789 is an equidigital number, since it uses as much as digits as its factorization.

381298789 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1741824, while the sum is 55.

The square root of 381298789 is about 19526.8735080657. The cubic root of 381298789 is about 725.1399105330.

The spelling of 381298789 in words is "three hundred eighty-one million, two hundred ninety-eight thousand, seven hundred eighty-nine".