381522949 has 2 divisors, whose sum is σ = 381522950. Its totient is φ = 381522948.

The previous prime is 381522937. The next prime is 381522989. The reversal of 381522949 is 949225183.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 273737025 + 107785924 = 16545^2 + 10382^2 .

It is a cyclic number.

It is not a de Polignac number, because 381522949 - 2¹⁵ = 381490181 is a prime.

It is a super-2 number, since 2×381522949² = 291119521227313202, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (381522929) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 190761474 + 190761475.

It is an arithmetic number, because the mean of its divisors is an integer number (190761475).

Almost surely, 2^381522949 is an apocalyptic number.

It is an amenable number.

381522949 is a deficient number, since it is larger than the sum of its proper divisors (1).

381522949 is an equidigital number, since it uses as much as digits as its factorization.

381522949 is an evil number, because the sum of its binary digits is even.

The product of its digits is 155520, while the sum is 43.

The square root of 381522949 is about 19532.6124468797. The cubic root of 381522949 is about 725.2819824237.

The spelling of 381522949 in words is "three hundred eighty-one million, five hundred twenty-two thousand, nine hundred forty-nine".