381516829 has 2 divisors, whose sum is σ = 381516830. Its totient is φ = 381516828.

The previous prime is 381516823. The next prime is 381516851. The reversal of 381516829 is 928615183.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 367603929 + 13912900 = 19173^2 + 3730^2 .

It is an emirp because it is prime and its reverse (928615183) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 381516829 - 2⁵ = 381516797 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (381516823) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 190758414 + 190758415.

It is an arithmetic number, because the mean of its divisors is an integer number (190758415).

Almost surely, 2^381516829 is an apocalyptic number.

It is an amenable number.

381516829 is a deficient number, since it is larger than the sum of its proper divisors (1).

381516829 is an equidigital number, since it uses as much as digits as its factorization.

381516829 is an evil number, because the sum of its binary digits is even.

The product of its digits is 103680, while the sum is 43.

The square root of 381516829 is about 19532.4557851797. The cubic root of 381516829 is about 725.2781043263.

The spelling of 381516829 in words is "three hundred eighty-one million, five hundred sixteen thousand, eight hundred twenty-nine".