394791487 has 4 divisors (see below), whose sum is σ = 395729656. Its totient is φ = 393853320.

The previous prime is 394791457. The next prime is 394791497. The reversal of 394791487 is 784197493.

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 394791487 - 2¹⁹ = 394267199 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (394791407) 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, 468453 + ... + 469294.

It is an arithmetic number, because the mean of its divisors is an integer number (98932414).

Almost surely, 2^394791487 is an apocalyptic number.

394791487 is a deficient number, since it is larger than the sum of its proper divisors (938169).

394791487 is an equidigital number, since it uses as much as digits as its factorization.

394791487 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 938168.

The product of its digits is 1524096, while the sum is 52.

The square root of 394791487 is about 19869.3605080788. The cubic root of 394791487 is about 733.5942631843.

The spelling of 394791487 in words is "three hundred ninety-four million, seven hundred ninety-one thousand, four hundred eighty-seven".