7743997 has 4 divisors (see below), whose sum is σ = 7749756. Its totient is φ = 7738240.

The previous prime is 7743991. The next prime is 7744007. The reversal of 7743997 is 7993477.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 7993477 = 2423 ⋅3299.

It can be written as a sum of positive squares in 2 ways, for example, as 3308761 + 4435236 = 1819^2 + 2106^2 .

It is a cyclic number.

It is not a de Polignac number, because 7743997 - 2¹⁵ = 7711229 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7743991) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 333 + ... + 3949.

It is an arithmetic number, because the mean of its divisors is an integer number (1937439).

Almost surely, 2^7743997 is an apocalyptic number.

It is an amenable number.

7743997 is a deficient number, since it is larger than the sum of its proper divisors (5759).

7743997 is a wasteful number, since it uses less digits than its factorization.

7743997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5758.

The product of its digits is 333396, while the sum is 46.

The square root of 7743997 is about 2782.8038019235. The cubic root of 7743997 is about 197.8434721820.

The spelling of 7743997 in words is "seven million, seven hundred forty-three thousand, nine hundred ninety-seven".