856473101 has 4 divisors (see below), whose sum is σ = 934334304. Its totient is φ = 778611900.

The previous prime is 856473091. The next prime is 856473109. The reversal of 856473101 is 101374658.

856473101 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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.

It is a de Polignac number, because none of the positive numbers 2^k-856473101 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (856473109) 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, 38930585 + ... + 38930606.

It is an arithmetic number, because the mean of its divisors is an integer number (233583576).

Almost surely, 2^856473101 is an apocalyptic number.

It is an amenable number.

856473101 is a deficient number, since it is larger than the sum of its proper divisors (77861203).

856473101 is a wasteful number, since it uses less digits than its factorization.

856473101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77861202.

The product of its (nonzero) digits is 20160, while the sum is 35.

The square root of 856473101 is about 29265.5616894670. The cubic root of 856473101 is about 949.6667717710. Note that the first 3 decimals are identical.

The spelling of 856473101 in words is "eight hundred fifty-six million, four hundred seventy-three thousand, one hundred one".