394622939033 has 4 divisors (see below), whose sum is σ = 397503398580. Its totient is φ = 391742479488.

The previous prime is 394622939027. The next prime is 394622939063. The reversal of 394622939033 is 330939226493.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 330939226493 = 219097 ⋅1510469.

It can be written as a sum of positive squares in 2 ways, for example, as 233044666009 + 161578273024 = 482747^2 + 401968^2 .

It is a cyclic number.

It is not a de Polignac number, because 394622939033 - 2²⁸ = 394354503577 is a prime.

It is a super-2 number, since 2×394622939033² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (394622939063) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1440229568 + ... + 1440229841.

It is an arithmetic number, because the mean of its divisors is an integer number (99375849645).

Almost surely, 2^394622939033 is an apocalyptic number.

It is an amenable number.

394622939033 is a deficient number, since it is larger than the sum of its proper divisors (2880459547).

394622939033 is a wasteful number, since it uses less digits than its factorization.

394622939033 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2880459546.

The product of its (nonzero) digits is 5668704, while the sum is 53.

The spelling of 394622939033 in words is "three hundred ninety-four billion, six hundred twenty-two million, nine hundred thirty-nine thousand, thirty-three".