1940697493 has 8 divisors (see below), whose sum is σ = 2254300160. Its totient is φ = 1636184880.

The previous prime is 1940697491. The next prime is 1940697497. The reversal of 1940697493 is 3947960491.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1940697493 - 2¹ = 1940697491 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1940697493.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1940697491) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2272053 + ... + 2272906.

It is an arithmetic number, because the mean of its divisors is an integer number (281787520).

Almost surely, 2^1940697493 is an apocalyptic number.

It is an amenable number.

1940697493 is a deficient number, since it is larger than the sum of its proper divisors (313602667).

1940697493 is an equidigital number, since it uses as much as digits as its factorization.

1940697493 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4545027.

The product of its (nonzero) digits is 1469664, while the sum is 52.

The square root of 1940697493 is about 44053.3482609438. The cubic root of 1940697493 is about 1247.3431554492.

The spelling of 1940697493 in words is "one billion, nine hundred forty million, six hundred ninety-seven thousand, four hundred ninety-three".