7764993 has 6 divisors (see below), whose sum is σ = 11216114. Its totient is φ = 5176656.

The previous prime is 7764979. The next prime is 7765001. The reversal of 7764993 is 3994677.

It can be written as a sum of positive squares in only one way, i.e., 6718464 + 1046529 = 2592^2 + 1023^2 .

It is not a de Polignac number, because 7764993 - 2¹² = 7760897 is a prime.

It is a Duffinian number.

7764993 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (7764943) 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 5 ways as a sum of consecutive naturals, for example, 431380 + ... + 431397.

Almost surely, 2^7764993 is an apocalyptic number.

It is an amenable number.

7764993 is a deficient number, since it is larger than the sum of its proper divisors (3451121).

7764993 is a wasteful number, since it uses less digits than its factorization.

7764993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 862783 (or 862780 counting only the distinct ones).

The product of its digits is 285768, while the sum is 45.

The square root of 7764993 is about 2786.5737025961. The cubic root of 7764993 is about 198.0221126207.

The spelling of 7764993 in words is "seven million, seven hundred sixty-four thousand, nine hundred ninety-three".