393140623 has 4 divisors (see below), whose sum is σ = 416266560. Its totient is φ = 370014688.

The previous prime is 393140611. The next prime is 393140639. The reversal of 393140623 is 326041393.

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

It is a cyclic number.

It is not a de Polignac number, because 393140623 - 2¹³ = 393132431 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (393140603) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11562943 + ... + 11562976.

It is an arithmetic number, because the mean of its divisors is an integer number (104066640).

Almost surely, 2^393140623 is an apocalyptic number.

393140623 is a deficient number, since it is larger than the sum of its proper divisors (23125937).

393140623 is a wasteful number, since it uses less digits than its factorization.

393140623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23125936.

The product of its (nonzero) digits is 11664, while the sum is 31.

The square root of 393140623 is about 19827.7740303848. The cubic root of 393140623 is about 732.5702995660.

The spelling of 393140623 in words is "three hundred ninety-three million, one hundred forty thousand, six hundred twenty-three".