7443997 has 4 divisors (see below), whose sum is σ = 8120736. Its totient is φ = 6767260.

The previous prime is 7443979. The next prime is 7444027. The reversal of 7443997 is 7993447.

It is a happy number.

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.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7443997 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7440997) 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, 338353 + ... + 338374.

It is an arithmetic number, because the mean of its divisors is an integer number (2030184).

Almost surely, 2^7443997 is an apocalyptic number.

It is an amenable number.

7443997 is a deficient number, since it is larger than the sum of its proper divisors (676739).

7443997 is a wasteful number, since it uses less digits than its factorization.

7443997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 676738.

The product of its digits is 190512, while the sum is 43.

The square root of 7443997 is about 2728.3689266666. The cubic root of 7443997 is about 195.2549546992.

The spelling of 7443997 in words is "seven million, four hundred forty-three thousand, nine hundred ninety-seven".