845381547 has 12 divisors (see below), whose sum is σ = 1222929864. Its totient is φ = 562746240.

The previous prime is 845381543. The next prime is 845381549. The reversal of 845381547 is 745183548.

It is not a de Polignac number, because 845381547 - 2² = 845381543 is a prime.

It is a super-2 number, since 2×845381547² = 1429339920016226418, which contains 22 as substring.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (845381543) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 63729 + ... + 75842.

It is an arithmetic number, because the mean of its divisors is an integer number (101910822).

Almost surely, 2^845381547 is an apocalyptic number.

845381547 is a deficient number, since it is larger than the sum of its proper divisors (377548317).

845381547 is a wasteful number, since it uses less digits than its factorization.

845381547 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 140250 (or 140247 counting only the distinct ones).

The product of its digits is 537600, while the sum is 45.

The square root of 845381547 is about 29075.4457747426. The cubic root of 845381547 is about 945.5494679712.

It can be divided in two parts, 8453 and 81547, that added together give a square (90000 = 300²).

The spelling of 845381547 in words is "eight hundred forty-five million, three hundred eighty-one thousand, five hundred forty-seven".