393958142 has 4 divisors (see below), whose sum is σ = 590937216. Its totient is φ = 196979070.

The previous prime is 393958133. The next prime is 393958157. The reversal of 393958142 is 241859393.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 241859393 = 13121 ⋅18433.

It is a junction number, because it is equal to n+sod(n) for n = 393958093 and 393958102.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 98489534 + ... + 98489537.

It is an arithmetic number, because the mean of its divisors is an integer number (147734304).

Almost surely, 2^393958142 is an apocalyptic number.

393958142 is a deficient number, since it is larger than the sum of its proper divisors (196979074).

393958142 is a wasteful number, since it uses less digits than its factorization.

393958142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 196979073.

The product of its digits is 233280, while the sum is 44.

The square root of 393958142 is about 19848.3788254860. The cubic root of 393958142 is about 733.0777308010.

The spelling of 393958142 in words is "three hundred ninety-three million, nine hundred fifty-eight thousand, one hundred forty-two".