475073021 has 2 divisors, whose sum is σ = 475073022. Its totient is φ = 475073020.

The previous prime is 475073003. The next prime is 475073023. The reversal of 475073021 is 120370574.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 406828900 + 68244121 = 20170^2 + 8261^2 .

It is a cyclic number.

It is not a de Polignac number, because 475073021 - 2²² = 470878717 is a prime.

Together with 475073023, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (475073023) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 237536510 + 237536511.

It is an arithmetic number, because the mean of its divisors is an integer number (237536511).

Almost surely, 2^475073021 is an apocalyptic number.

It is an amenable number.

475073021 is a deficient number, since it is larger than the sum of its proper divisors (1).

475073021 is an equidigital number, since it uses as much as digits as its factorization.

475073021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5880, while the sum is 29.

The square root of 475073021 is about 21796.1698699565. The cubic root of 475073021 is about 780.2853552685.

The spelling of 475073021 in words is "four hundred seventy-five million, seventy-three thousand, twenty-one".