381967145 has 16 divisors (see below), whose sum is σ = 525141120. Its totient is φ = 261270144.

The previous prime is 381967139. The next prime is 381967147. The reversal of 381967145 is 541769183.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-381967145 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 381967096 and 381967105.

It is not an unprimeable number, because it can be changed into a prime (381967147) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 974 + ... + 27656.

It is an arithmetic number, because the mean of its divisors is an integer number (32821320).

Almost surely, 2^381967145 is an apocalyptic number.

381967145 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

It is an amenable number.

381967145 is a deficient number, since it is larger than the sum of its proper divisors (143173975).

381967145 is a wasteful number, since it uses less digits than its factorization.

381967145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27104.

The product of its digits is 181440, while the sum is 44.

The square root of 381967145 is about 19543.9797635998. The cubic root of 381967145 is about 725.5633481163.

The spelling of 381967145 in words is "three hundred eighty-one million, nine hundred sixty-seven thousand, one hundred forty-five".