7730945 has 4 divisors (see below), whose sum is σ = 9277140. Its totient is φ = 6184752.

The previous prime is 7730923. The next prime is 7730953. The reversal of 7730945 is 5490377.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 976144 + 6754801 = 988^2 + 2599^2 .

It is a cyclic number.

It is not a de Polignac number, because 7730945 - 2⁶ = 7730881 is a prime.

It is an Ulam number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 773090 + ... + 773099.

It is an arithmetic number, because the mean of its divisors is an integer number (2319285).

Almost surely, 2^7730945 is an apocalyptic number.

It is an amenable number.

7730945 is a deficient number, since it is larger than the sum of its proper divisors (1546195).

7730945 is a wasteful number, since it uses less digits than its factorization.

7730945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1546194.

The product of its (nonzero) digits is 26460, while the sum is 35.

The square root of 7730945 is about 2780.4576961357. The cubic root of 7730945 is about 197.7322589373.

The spelling of 7730945 in words is "seven million, seven hundred thirty thousand, nine hundred forty-five".