474100021 has 2 divisors, whose sum is σ = 474100022. Its totient is φ = 474100020.

The previous prime is 474099953. The next prime is 474100031. The reversal of 474100021 is 120001474.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 430355025 + 43744996 = 20745^2 + 6614^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-474100021 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (474100031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 237050010 + 237050011.

It is an arithmetic number, because the mean of its divisors is an integer number (237050011).

Almost surely, 2^474100021 is an apocalyptic number.

It is an amenable number.

474100021 is a deficient number, since it is larger than the sum of its proper divisors (1).

474100021 is an equidigital number, since it uses as much as digits as its factorization.

474100021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 224, while the sum is 19.

The square root of 474100021 is about 21773.8379942536. The cubic root of 474100021 is about 779.7522887523.

Adding to 474100021 its reverse (120001474), we get a palindrome (594101495).

The spelling of 474100021 in words is "four hundred seventy-four million, one hundred thousand, twenty-one".