2150646397 has 4 divisors (see below), whose sum is σ = 2169678780. Its totient is φ = 2131614016.

The previous prime is 2150646391. The next prime is 2150646403. The reversal of 2150646397 is 7936460512.

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 (2150646391) and next prime (2150646403).

It can be written as a sum of positive squares in 2 ways, for example, as 650556036 + 1500090361 = 25506^2 + 38731^2 .

It is a cyclic number.

It is not a de Polignac number, because 2150646397 - 2¹⁹ = 2150122109 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 (2150646391) 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, 9516022 + ... + 9516247.

It is an arithmetic number, because the mean of its divisors is an integer number (542419695).

Almost surely, 2^2150646397 is an apocalyptic number.

It is an amenable number.

2150646397 is a deficient number, since it is larger than the sum of its proper divisors (19032383).

2150646397 is a wasteful number, since it uses less digits than its factorization.

2150646397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19032382.

The product of its (nonzero) digits is 272160, while the sum is 43.

The square root of 2150646397 is about 46375.0622317642. The cubic root of 2150646397 is about 1290.7922135452.

The spelling of 2150646397 in words is "two billion, one hundred fifty million, six hundred forty-six thousand, three hundred ninety-seven".