394015873 has 4 divisors (see below), whose sum is σ = 394108848. Its totient is φ = 393922900.

The previous prime is 394015871. The next prime is 394015877. The reversal of 394015873 is 378510493.

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 a cyclic number.

It is not a de Polignac number, because 394015873 - 2¹ = 394015871 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

394015873 is a modest number, since divided by 15873 gives 394 as remainder.

It is not an unprimeable number, because it can be changed into a prime (394015871) 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, 39811 + ... + 48712.

It is an arithmetic number, because the mean of its divisors is an integer number (98527212).

Almost surely, 2^394015873 is an apocalyptic number.

It is an amenable number.

394015873 is a deficient number, since it is larger than the sum of its proper divisors (92975).

394015873 is an equidigital number, since it uses as much as digits as its factorization.

394015873 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92974.

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

The square root of 394015873 is about 19849.8330723460. The cubic root of 394015873 is about 733.1135376874.

The spelling of 394015873 in words is "three hundred ninety-four million, fifteen thousand, eight hundred seventy-three".