394012667 has 4 divisors (see below), whose sum is σ = 404661696. Its totient is φ = 383363640.

The previous prime is 394012657. The next prime is 394012669. The reversal of 394012667 is 766210493.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 766210493 = 79 ⋅9698867.

It is a cyclic number.

It is not a de Polignac number, because 394012667 - 2⁴ = 394012651 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 394012667.

It is not an unprimeable number, because it can be changed into a prime (394012669) 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, 5324459 + ... + 5324532.

It is an arithmetic number, because the mean of its divisors is an integer number (101165424).

Almost surely, 2^394012667 is an apocalyptic number.

394012667 is a gapful number since it is divisible by the number (37) formed by its first and last digit.

394012667 is a deficient number, since it is larger than the sum of its proper divisors (10649029).

394012667 is a wasteful number, since it uses less digits than its factorization.

394012667 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10649028.

The product of its (nonzero) digits is 54432, while the sum is 38.

The square root of 394012667 is about 19849.7523158351. The cubic root of 394012667 is about 733.1115493002. Note that the first 3 decimals are identical.

The spelling of 394012667 in words is "three hundred ninety-four million, twelve thousand, six hundred sixty-seven".