7943945 has 8 divisors (see below), whose sum is σ = 9603144. Its totient is φ = 6308224.

The previous prime is 7943927. The next prime is 7943951. The reversal of 7943945 is 5493497.

It can be written as a sum of positive squares in 4 ways, for example, as 2393209 + 5550736 = 1547^2 + 2356^2 .

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 7943945 - 2¹² = 7939849 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5114 + ... + 6483.

It is an arithmetic number, because the mean of its divisors is an integer number (1200393).

Almost surely, 2^7943945 is an apocalyptic number.

It is an amenable number.

7943945 is a deficient number, since it is larger than the sum of its proper divisors (1659199).

7943945 is a wasteful number, since it uses less digits than its factorization.

7943945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11739.

The product of its digits is 136080, while the sum is 41.

The square root of 7943945 is about 2818.5004878481. The cubic root of 7943945 is about 199.5317797042.

It can be divided in two parts, 7943 and 945, that added together give a palindrome (8888).

The spelling of 7943945 in words is "seven million, nine hundred forty-three thousand, nine hundred forty-five".