394432487 has 4 divisors (see below), whose sum is σ = 417634416. Its totient is φ = 371230560.

The previous prime is 394432483. The next prime is 394432553. The reversal of 394432487 is 784234493.

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 394432487 - 2² = 394432483 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 (394432481) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11600939 + ... + 11600972.

It is an arithmetic number, because the mean of its divisors is an integer number (104408604).

Almost surely, 2^394432487 is an apocalyptic number.

394432487 is a deficient number, since it is larger than the sum of its proper divisors (23201929).

394432487 is a wasteful number, since it uses less digits than its factorization.

394432487 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23201928.

The product of its digits is 580608, while the sum is 44.

The square root of 394432487 is about 19860.3244434727. The cubic root of 394432487 is about 733.3718333552.

The spelling of 394432487 in words is "three hundred ninety-four million, four hundred thirty-two thousand, four hundred eighty-seven".