1086642197 has 4 divisors (see below), whose sum is σ = 1086793260. Its totient is φ = 1086491136.

The previous prime is 1086642191. The next prime is 1086642203. The reversal of 1086642197 is 7912466801.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (1086642191) and next prime (1086642203).

It can be written as a sum of positive squares in 2 ways, for example, as 855328516 + 231313681 = 29246^2 + 15209^2 .

It is a cyclic number.

It is not a de Polignac number, because 1086642197 - 2⁴ = 1086642181 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 (1086642191) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 64172 + ... + 79317.

It is an arithmetic number, because the mean of its divisors is an integer number (271698315).

Almost surely, 2^1086642197 is an apocalyptic number.

It is an amenable number.

1086642197 is a deficient number, since it is larger than the sum of its proper divisors (151063).

1086642197 is an equidigital number, since it uses as much as digits as its factorization.

1086642197 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 151062.

The product of its (nonzero) digits is 145152, while the sum is 44.

The square root of 1086642197 is about 32964.2563544212. The cubic root of 1086642197 is about 1028.0846035156.

The spelling of 1086642197 in words is "one billion, eighty-six million, six hundred forty-two thousand, one hundred ninety-seven".