474009661 has 2 divisors, whose sum is σ = 474009662. Its totient is φ = 474009660.

The previous prime is 474009647. The next prime is 474009673. The reversal of 474009661 is 166900474.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 268632100 + 205377561 = 16390^2 + 14331^2 .

It is a cyclic number.

It is not a de Polignac number, because 474009661 - 2⁵ = 474009629 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 474009661.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (474009631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 237004830 + 237004831.

It is an arithmetic number, because the mean of its divisors is an integer number (237004831).

Almost surely, 2^474009661 is an apocalyptic number.

It is an amenable number.

474009661 is a deficient number, since it is larger than the sum of its proper divisors (1).

474009661 is an equidigital number, since it uses as much as digits as its factorization.

474009661 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36288, while the sum is 37.

The square root of 474009661 is about 21771.7629281600. The cubic root of 474009661 is about 779.7027472418.

The spelling of 474009661 in words is "four hundred seventy-four million, nine thousand, six hundred sixty-one".