472891391 has 8 divisors (see below), whose sum is σ = 557881344. Its totient is φ = 392259960.

The previous prime is 472891373. The next prime is 472891403. The reversal of 472891391 is 193198274.

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

It is a cyclic number.

It is not a de Polignac number, because 472891391 - 2¹⁸ = 472629247 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 (472890391) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1089395 + ... + 1089828.

It is an arithmetic number, because the mean of its divisors is an integer number (69735168).

Almost surely, 2^472891391 is an apocalyptic number.

472891391 is a deficient number, since it is larger than the sum of its proper divisors (84989953).

472891391 is a wasteful number, since it uses less digits than its factorization.

472891391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2179261.

The product of its digits is 108864, while the sum is 44.

The square root of 472891391 is about 21746.0661040106. The cubic root of 472891391 is about 779.0891136452.

The spelling of 472891391 in words is "four hundred seventy-two million, eight hundred ninety-one thousand, three hundred ninety-one".