845471929 has 3 divisors (see below), whose sum is σ = 845501007. Its totient is φ = 845442852.

The previous prime is 845471923. The next prime is 845471951. The reversal of 845471929 is 929174548.

The square root of 845471929 is 29077.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 677821225 + 167650704 = 26035^2 + 12948^2 .

It is not a de Polignac number, because 845471929 - 2¹⁷ = 845340857 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (845471923) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 14539 + ... + 43615.

It is an arithmetic number, because the mean of its divisors is an integer number (281833669).

Almost surely, 2^845471929 is an apocalyptic number.

845471929 is the 29077-th square number.

845471929 is the 14539-th centered octagonal number.

It is an amenable number.

845471929 is a deficient number, since it is larger than the sum of its proper divisors (29078).

845471929 is an frugal number, since it uses more digits than its factorization.

845471929 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58154 (or 29077 counting only the distinct ones).

The product of its digits is 725760, while the sum is 49.

The cubic root of 845471929 is about 945.5831638437.

Multiplying 845471929 by its sum of digits (49), we get a square (41428124521 = 203539²).

It can be divided in two parts, 845471 and 929, that added together give a square (846400 = 920²).

The spelling of 845471929 in words is "eight hundred forty-five million, four hundred seventy-one thousand, nine hundred twenty-nine".