2140197394 has 4 divisors (see below), whose sum is σ = 3210296094. Its totient is φ = 1070098696.

The previous prime is 2140197391. The next prime is 2140197407. The reversal of 2140197394 is 4937910412.

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

It can be written as a sum of positive squares in only one way, i.e., 1910826369 + 229371025 = 43713^2 + 15145^2 .

It is not an unprimeable number, because it can be changed into a prime (2140197391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 535049347 + ... + 535049350.

Almost surely, 2^2140197394 is an apocalyptic number.

2140197394 is a deficient number, since it is larger than the sum of its proper divisors (1070098700).

2140197394 is a wasteful number, since it uses less digits than its factorization.

2140197394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1070098699.

The product of its (nonzero) digits is 54432, while the sum is 40.

The square root of 2140197394 is about 46262.2674973893. The cubic root of 2140197394 is about 1288.6983633650.

The spelling of 2140197394 in words is "two billion, one hundred forty million, one hundred ninety-seven thousand, three hundred ninety-four".