471920861 has 2 divisors, whose sum is σ = 471920862. Its totient is φ = 471920860.

The previous prime is 471920849. The next prime is 471920887. The reversal of 471920861 is 168029174.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 330548761 + 141372100 = 18181^2 + 11890^2 .

It is a cyclic number.

It is not a de Polignac number, because 471920861 - 2⁶ = 471920797 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (471923861) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 235960430 + 235960431.

It is an arithmetic number, because the mean of its divisors is an integer number (235960431).

Almost surely, 2^471920861 is an apocalyptic number.

It is an amenable number.

471920861 is a deficient number, since it is larger than the sum of its proper divisors (1).

471920861 is an equidigital number, since it uses as much as digits as its factorization.

471920861 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 24192, while the sum is 38.

The square root of 471920861 is about 21723.7395721823. The cubic root of 471920861 is about 778.5557655103. Note that the first 3 decimals are identical.

The spelling of 471920861 in words is "four hundred seventy-one million, nine hundred twenty thousand, eight hundred sixty-one".