381912733 has 2 divisors, whose sum is σ = 381912734. Its totient is φ = 381912732.

The previous prime is 381912721. The next prime is 381912737. The reversal of 381912733 is 337219183.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 369331524 + 12581209 = 19218^2 + 3547^2 .

It is a cyclic number.

It is not a de Polignac number, because 381912733 - 2¹⁷ = 381781661 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 381912692 and 381912701.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (381912737) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 190956366 + 190956367.

It is an arithmetic number, because the mean of its divisors is an integer number (190956367).

Almost surely, 2^381912733 is an apocalyptic number.

It is an amenable number.

381912733 is a deficient number, since it is larger than the sum of its proper divisors (1).

381912733 is an equidigital number, since it uses as much as digits as its factorization.

381912733 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 27216, while the sum is 37.

The square root of 381912733 is about 19542.5876741029. The cubic root of 381912733 is about 725.5288938199.

The spelling of 381912733 in words is "three hundred eighty-one million, nine hundred twelve thousand, seven hundred thirty-three".