471820891 has 2 divisors, whose sum is σ = 471820892. Its totient is φ = 471820890.

The previous prime is 471820813. The next prime is 471820913. The reversal of 471820891 is 198028174.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 471820891 - 2¹³ = 471812699 is a prime.

It is a super-2 number, since 2×471820891² = 445229906368067762, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (471827891) 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 as a sum of consecutive naturals, namely, 235910445 + 235910446.

It is an arithmetic number, because the mean of its divisors is an integer number (235910446).

Almost surely, 2^471820891 is an apocalyptic number.

471820891 is a deficient number, since it is larger than the sum of its proper divisors (1).

471820891 is an equidigital number, since it uses as much as digits as its factorization.

471820891 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 32256, while the sum is 40.

The square root of 471820891 is about 21721.4385112957. The cubic root of 471820891 is about 778.5007861533.

The spelling of 471820891 in words is "four hundred seventy-one million, eight hundred twenty thousand, eight hundred ninety-one".