2140397469 has 18 divisors (see below), whose sum is σ = 3596450910. Its totient is φ = 1223084016.

The previous prime is 2140397459. The next prime is 2140397473. The reversal of 2140397469 is 9647930412.

It is a happy number.

2140397469 is a `hidden beast` number, since 214 + 0 + 397 + 46 + 9 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1597041369 + 543356100 = 39963^2 + 23310^2 .

It is not a de Polignac number, because 2140397469 - 2⁹ = 2140396957 is a prime.

It is a super-2 number, since 2×2140397469² = 9162602650603211922, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2140397459) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 2426314 + ... + 2427195.

Almost surely, 2^2140397469 is an apocalyptic number.

It is an amenable number.

2140397469 is a deficient number, since it is larger than the sum of its proper divisors (1456053441).

2140397469 is a wasteful number, since it uses less digits than its factorization.

2140397469 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4853529 (or 4853519 counting only the distinct ones).

The product of its (nonzero) digits is 326592, while the sum is 45.

The square root of 2140397469 is about 46264.4298462653. The cubic root of 2140397469 is about 1288.7385198309.

The spelling of 2140397469 in words is "two billion, one hundred forty million, three hundred ninety-seven thousand, four hundred sixty-nine".