394158073 has 8 divisors (see below), whose sum is σ = 418972392. Its totient is φ = 369524736.

The previous prime is 394158067. The next prime is 394158091. The reversal of 394158073 is 370851493.

It can be written as a sum of positive squares in 4 ways, for example, as 310746384 + 83411689 = 17628^2 + 9133^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-394158073 is a prime.

It is a super-2 number, since 2×394158073² = 310721173022146658, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (394158013) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 40740 + ... + 49477.

It is an arithmetic number, because the mean of its divisors is an integer number (52371549).

Almost surely, 2^394158073 is an apocalyptic number.

It is an amenable number.

394158073 is a deficient number, since it is larger than the sum of its proper divisors (24814319).

394158073 is a wasteful number, since it uses less digits than its factorization.

394158073 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90491.

The product of its (nonzero) digits is 90720, while the sum is 40.

The square root of 394158073 is about 19853.4146433303. The cubic root of 394158073 is about 733.2017204347.

The spelling of 394158073 in words is "three hundred ninety-four million, one hundred fifty-eight thousand, seventy-three".