7940769 has 4 divisors (see below), whose sum is σ = 10587696. Its totient is φ = 5293844.

The previous prime is 7940761. The next prime is 7940771. The reversal of 7940769 is 9670497.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 9670497 = 3 ⋅3223499.

It is a cyclic number.

It is not a de Polignac number, because 7940769 - 2³ = 7940761 is a prime.

It is a super-2 number, since 2×7940769² = 126111624622722, which contains 22 as substring.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 7940769.

It is not an unprimeable number, because it can be changed into a prime (7940761) 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 3 ways as a sum of consecutive naturals, for example, 1323459 + ... + 1323464.

It is an arithmetic number, because the mean of its divisors is an integer number (2646924).

Almost surely, 2^7940769 is an apocalyptic number.

It is an amenable number.

7940769 is a deficient number, since it is larger than the sum of its proper divisors (2646927).

7940769 is a wasteful number, since it uses less digits than its factorization.

7940769 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2646926.

The product of its (nonzero) digits is 95256, while the sum is 42.

The square root of 7940769 is about 2817.9370113613. The cubic root of 7940769 is about 199.5051851342.

The spelling of 7940769 in words is "seven million, nine hundred forty thousand, seven hundred sixty-nine".