7943399145 has 48 divisors (see below), whose sum is σ = 15030235584. Its totient is φ = 3848784000.

The previous prime is 7943399137. The next prime is 7943399147. The reversal of 7943399145 is 5419933497.

It is a happy number.

7943399145 is a `hidden beast` number, since 79 + 43 + 399 + 145 = 666.

It is not a de Polignac number, because 7943399145 - 2³ = 7943399137 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 7943399091 and 7943399100.

It is not an unprimeable number, because it can be changed into a prime (7943399147) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 892015 + ... + 900875.

It is an arithmetic number, because the mean of its divisors is an integer number (313129908).

Almost surely, 2^7943399145 is an apocalyptic number.

It is an amenable number.

7943399145 is a deficient number, since it is larger than the sum of its proper divisors (7086836439).

7943399145 is a wasteful number, since it uses less digits than its factorization.

7943399145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10694 (or 10691 counting only the distinct ones).

The product of its digits is 3674160, while the sum is 54.

The square root of 7943399145 is about 89125.7490571608. The cubic root of 7943399145 is about 1995.2720943443.

The spelling of 7943399145 in words is "seven billion, nine hundred forty-three million, three hundred ninety-nine thousand, one hundred forty-five".