394637147 has 4 divisors (see below), whose sum is σ = 395602440. Its totient is φ = 393671856.

The previous prime is 394637143. The next prime is 394637171. The reversal of 394637147 is 741736493.

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 394637147 - 2² = 394637143 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 394637098 and 394637107.

It is not an unprimeable number, because it can be changed into a prime (394637143) 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, 482033 + ... + 482850.

It is an arithmetic number, because the mean of its divisors is an integer number (98900610).

Almost surely, 2^394637147 is an apocalyptic number.

394637147 is a deficient number, since it is larger than the sum of its proper divisors (965293).

394637147 is an equidigital number, since it uses as much as digits as its factorization.

394637147 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 965292.

The product of its digits is 381024, while the sum is 44.

The square root of 394637147 is about 19865.4762590782. The cubic root of 394637147 is about 733.4986534764.

The spelling of 394637147 in words is "three hundred ninety-four million, six hundred thirty-seven thousand, one hundred forty-seven".