820545134 has 8 divisors (see below), whose sum is σ = 1295597640. Its totient is φ = 388679256.

The previous prime is 820545101. The next prime is 820545139. The reversal of 820545134 is 431545028.

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

It is a self number, because there is not a number n which added to its sum of digits gives 820545134.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (820545139) 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, 10796609 + ... + 10796684.

It is an arithmetic number, because the mean of its divisors is an integer number (161949705).

Almost surely, 2^820545134 is an apocalyptic number.

820545134 is a deficient number, since it is larger than the sum of its proper divisors (475052506).

820545134 is a wasteful number, since it uses less digits than its factorization.

820545134 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21593314.

The product of its (nonzero) digits is 19200, while the sum is 32.

The square root of 820545134 is about 28645.1589976387. The cubic root of 820545134 is about 936.1975310272.

The spelling of 820545134 in words is "eight hundred twenty million, five hundred forty-five thousand, one hundred thirty-four".