997070191 has 16 divisors (see below), whose sum is σ = 1113152544. Its totient is φ = 887082624.

The previous prime is 997070189. The next prime is 997070203. The reversal of 997070191 is 191070799.

It is a cyclic number.

It is not a de Polignac number, because 997070191 - 2¹ = 997070189 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (997070131) 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 15 ways as a sum of consecutive naturals, for example, 41781 + ... + 61153.

It is an arithmetic number, because the mean of its divisors is an integer number (69572034).

Almost surely, 2^997070191 is an apocalyptic number.

997070191 is a deficient number, since it is larger than the sum of its proper divisors (116082353).

997070191 is a wasteful number, since it uses less digits than its factorization.

997070191 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19530.

The product of its (nonzero) digits is 35721, while the sum is 43.

The square root of 997070191 is about 31576.4182737688. The cubic root of 997070191 is about 999.0224416911.

The spelling of 997070191 in words is "nine hundred ninety-seven million, seventy thousand, one hundred ninety-one".