475072421 has 2 divisors, whose sum is σ = 475072422. Its totient is φ = 475072420.

The previous prime is 475072399. The next prime is 475072457. The reversal of 475072421 is 124270574.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 456676900 + 18395521 = 21370^2 + 4289^2 .

It is a cyclic number.

It is not a de Polignac number, because 475072421 - 2⁶ = 475072357 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (475072621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 237536210 + 237536211.

It is an arithmetic number, because the mean of its divisors is an integer number (237536211).

Almost surely, 2^475072421 is an apocalyptic number.

It is an amenable number.

475072421 is a deficient number, since it is larger than the sum of its proper divisors (1).

475072421 is an equidigital number, since it uses as much as digits as its factorization.

475072421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15680, while the sum is 32.

The square root of 475072421 is about 21796.1561060660. The cubic root of 475072421 is about 780.2850267777.

The spelling of 475072421 in words is "four hundred seventy-five million, seventy-two thousand, four hundred twenty-one".