381066401 has 4 divisors (see below), whose sum is σ = 381257904. Its totient is φ = 380874900.

The previous prime is 381066391. The next prime is 381066463. The reversal of 381066401 is 104660183.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 104660183 = 2221 ⋅47123.

It is a cyclic number.

It is not a de Polignac number, because 381066401 - 2¹⁸ = 380804257 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (381066701) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 92735 + ... + 96756.

It is an arithmetic number, because the mean of its divisors is an integer number (95314476).

Almost surely, 2^381066401 is an apocalyptic number.

It is an amenable number.

381066401 is a deficient number, since it is larger than the sum of its proper divisors (191503).

381066401 is a wasteful number, since it uses less digits than its factorization.

381066401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 191502.

The product of its (nonzero) digits is 3456, while the sum is 29.

The square root of 381066401 is about 19520.9221349812. The cubic root of 381066401 is about 724.9925649654.

The spelling of 381066401 in words is "three hundred eighty-one million, sixty-six thousand, four hundred one".