393042478707 has 8 divisors (see below), whose sum is σ = 582285153680. Its totient is φ = 262028319120.

The previous prime is 393042478687. The next prime is 393042478739. The reversal of 393042478707 is 707874240393.

393042478707 is a `hidden beast` number, since 39 + 30 + 42 + 478 + 70 + 7 = 666.

It is not a de Polignac number, because 393042478707 - 2¹² = 393042474611 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (393042479707) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7278564394 + ... + 7278564447.

It is an arithmetic number, because the mean of its divisors is an integer number (72785644210).

Almost surely, 2^393042478707 is an apocalyptic number.

393042478707 is a deficient number, since it is larger than the sum of its proper divisors (189242674973).

393042478707 is a wasteful number, since it uses less digits than its factorization.

393042478707 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14557128850 (or 14557128844 counting only the distinct ones).

The product of its (nonzero) digits is 7112448, while the sum is 54.

Adding to 393042478707 its sum of digits (54), we get a square (393042478761 = 626931²).

The spelling of 393042478707 in words is "three hundred ninety-three billion, forty-two million, four hundred seventy-eight thousand, seven hundred seven".