394149617 has 4 divisors (see below), whose sum is σ = 394574820. Its totient is φ = 393724416.

The previous prime is 394149589. The next prime is 394149629. The reversal of 394149617 is 716941493.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 92467456 + 301682161 = 9616^2 + 17369^2 .

It is a cyclic number.

It is not a de Polignac number, because 394149617 - 2¹⁰ = 394148593 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (394149647) 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, 211208 + ... + 213065.

It is an arithmetic number, because the mean of its divisors is an integer number (98643705).

Almost surely, 2^394149617 is an apocalyptic number.

It is an amenable number.

394149617 is a deficient number, since it is larger than the sum of its proper divisors (425203).

394149617 is an equidigital number, since it uses as much as digits as its factorization.

394149617 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 425202.

The product of its digits is 163296, while the sum is 44.

The square root of 394149617 is about 19853.2016813410. The cubic root of 394149617 is about 733.1964771931.

The spelling of 394149617 in words is "three hundred ninety-four million, one hundred forty-nine thousand, six hundred seventeen".