394012533 has 4 divisors (see below), whose sum is σ = 525350048. Its totient is φ = 262675020.

The previous prime is 394012529. The next prime is 394012631. The reversal of 394012533 is 335210493.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 394012533 - 2² = 394012529 is a prime.

It is a super-2 number, since 2×394012533² = 310491752322152178, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 394012533.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (394012033) 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, 65668753 + ... + 65668758.

It is an arithmetic number, because the mean of its divisors is an integer number (131337512).

Almost surely, 2^394012533 is an apocalyptic number.

It is an amenable number.

394012533 is a deficient number, since it is larger than the sum of its proper divisors (131337515).

394012533 is a wasteful number, since it uses less digits than its factorization.

394012533 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 131337514.

The product of its (nonzero) digits is 9720, while the sum is 30.

The square root of 394012533 is about 19849.7489404778. The cubic root of 394012533 is about 733.1114661921. Note that the first 3 decimals are identical.

The spelling of 394012533 in words is "three hundred ninety-four million, twelve thousand, five hundred thirty-three".