477991069 has 2 divisors, whose sum is σ = 477991070. Its totient is φ = 477991068.

The previous prime is 477991067. The next prime is 477991121. The reversal of 477991069 is 960199774.

It is an a-pointer prime, because the next prime (477991121) can be obtained adding 477991069 to its sum of digits (52).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 401200900 + 76790169 = 20030^2 + 8763^2 .

It is a cyclic number.

It is not a de Polignac number, because 477991069 - 2¹ = 477991067 is a prime.

It is a super-2 number, since 2×477991069² = 456950924087525522, which contains 22 as substring.

Together with 477991067, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (477991067) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 238995534 + 238995535.

It is an arithmetic number, because the mean of its divisors is an integer number (238995535).

Almost surely, 2^477991069 is an apocalyptic number.

It is an amenable number.

477991069 is a deficient number, since it is larger than the sum of its proper divisors (1).

477991069 is an equidigital number, since it uses as much as digits as its factorization.

477991069 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 857304, while the sum is 52.

The square root of 477991069 is about 21863.0068609055. The cubic root of 477991069 is about 781.8796814951.

The spelling of 477991069 in words is "four hundred seventy-seven million, nine hundred ninety-one thousand, sixty-nine".