2149193997 has 6 divisors (see below), whose sum is σ = 3104391342. Its totient is φ = 1432795992.

The previous prime is 2149193989. The next prime is 2149194007. The reversal of 2149193997 is 7993919412.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 2005337961 + 143856036 = 44781^2 + 11994^2 .

It is not a de Polignac number, because 2149193997 - 2³ = 2149193989 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2149197997) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 119399658 + ... + 119399675.

It is an arithmetic number, because the mean of its divisors is an integer number (517398557).

Almost surely, 2^2149193997 is an apocalyptic number.

It is an amenable number.

2149193997 is a deficient number, since it is larger than the sum of its proper divisors (955197345).

2149193997 is a wasteful number, since it uses less digits than its factorization.

2149193997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 238799339 (or 238799336 counting only the distinct ones).

The product of its digits is 1102248, while the sum is 54.

The square root of 2149193997 is about 46359.4003088910. The cubic root of 2149193997 is about 1290.5015770809.

The spelling of 2149193997 in words is "two billion, one hundred forty-nine million, one hundred ninety-three thousand, nine hundred ninety-seven".