474728021 has 2 divisors, whose sum is σ = 474728022. Its totient is φ = 474728020.

The previous prime is 474728011. The next prime is 474728063. The reversal of 474728021 is 120827474.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 417180625 + 57547396 = 20425^2 + 7586^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-474728021 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (474728011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 237364010 + 237364011.

It is an arithmetic number, because the mean of its divisors is an integer number (237364011).

Almost surely, 2^474728021 is an apocalyptic number.

It is an amenable number.

474728021 is a deficient number, since it is larger than the sum of its proper divisors (1).

474728021 is an equidigital number, since it uses as much as digits as its factorization.

474728021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 25088, while the sum is 35.

The square root of 474728021 is about 21788.2541980765. The cubic root of 474728021 is about 780.0964273730.

It can be divided in two parts, 4747 and 28021, that added together give a 15-th power (32768 = 2¹⁵).

The spelling of 474728021 in words is "four hundred seventy-four million, seven hundred twenty-eight thousand, twenty-one".