971201785 has 4 divisors (see below), whose sum is σ = 1165442148. Its totient is φ = 776961424.

The previous prime is 971201713. The next prime is 971201797. The reversal of 971201785 is 587102179.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 587102179 = 19507 ⋅30097.

It can be written as a sum of positive squares in 2 ways, for example, as 347151424 + 624050361 = 18632^2 + 24981^2 .

It is a cyclic number.

It is not a de Polignac number, because 971201785 - 2¹¹ = 971199737 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 97120174 + ... + 97120183.

It is an arithmetic number, because the mean of its divisors is an integer number (291360537).

Almost surely, 2^971201785 is an apocalyptic number.

It is an amenable number.

971201785 is a deficient number, since it is larger than the sum of its proper divisors (194240363).

971201785 is a wasteful number, since it uses less digits than its factorization.

971201785 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 194240362.

The product of its (nonzero) digits is 35280, while the sum is 40.

The square root of 971201785 is about 31164.1105279775. The cubic root of 971201785 is about 990.3069432218.

The spelling of 971201785 in words is "nine hundred seventy-one million, two hundred one thousand, seven hundred eighty-five".