381072905 has 8 divisors (see below), whose sum is σ = 473056200. Its totient is φ = 294345856.

The previous prime is 381072893. The next prime is 381072907. The reversal of 381072905 is 509270183.

It can be written as a sum of positive squares in 4 ways, for example, as 45010681 + 336062224 = 6709^2 + 18332^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 381072905 - 2¹⁴ = 381056521 is a prime.

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

It is not an unprimeable number, because it can be changed into a prime (381072907) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1313900 + ... + 1314189.

It is an arithmetic number, because the mean of its divisors is an integer number (59132025).

Almost surely, 2^381072905 is an apocalyptic number.

It is an amenable number.

381072905 is a deficient number, since it is larger than the sum of its proper divisors (91983295).

381072905 is a wasteful number, since it uses less digits than its factorization.

381072905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2628123.

The product of its (nonzero) digits is 15120, while the sum is 35.

The square root of 381072905 is about 19521.0887247612. The cubic root of 381072905 is about 724.9966896401.

The spelling of 381072905 in words is "three hundred eighty-one million, seventy-two thousand, nine hundred five".