381379969 has 2 divisors, whose sum is σ = 381379970. Its totient is φ = 381379968.

The previous prime is 381379919. The next prime is 381379987. The reversal of 381379969 is 969973183.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 380250000 + 1129969 = 19500^2 + 1063^2 .

It is a cyclic number.

It is not a de Polignac number, because 381379969 - 2¹³ = 381371777 is a prime.

It is a super-2 number, since 2×381379969² = 290901361508881922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (381379919) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 190689984 + 190689985.

It is an arithmetic number, because the mean of its divisors is an integer number (190689985).

Almost surely, 2^381379969 is an apocalyptic number.

It is an amenable number.

381379969 is a deficient number, since it is larger than the sum of its proper divisors (1).

381379969 is an equidigital number, since it uses as much as digits as its factorization.

381379969 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2204496, while the sum is 55.

The square root of 381379969 is about 19528.9520712198. The cubic root of 381379969 is about 725.1913685868.

The spelling of 381379969 in words is "three hundred eighty-one million, three hundred seventy-nine thousand, nine hundred sixty-nine".