469989661 has 2 divisors, whose sum is σ = 469989662. Its totient is φ = 469989660.

The previous prime is 469989649. The next prime is 469989673. The reversal of 469989661 is 166989964.

It is a balanced prime because it is at equal distance from previous prime (469989649) and next prime (469989673).

It can be written as a sum of positive squares in only one way, i.e., 236083225 + 233906436 = 15365^2 + 15294^2 .

It is a cyclic number.

It is not a de Polignac number, because 469989661 - 2¹¹ = 469987613 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 469989596 and 469989605.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (469989761) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 234994830 + 234994831.

It is an arithmetic number, because the mean of its divisors is an integer number (234994831).

Almost surely, 2^469989661 is an apocalyptic number.

It is an amenable number.

469989661 is a deficient number, since it is larger than the sum of its proper divisors (1).

469989661 is an equidigital number, since it uses as much as digits as its factorization.

469989661 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5038848, while the sum is 58.

The square root of 469989661 is about 21679.2449361134. The cubic root of 469989661 is about 777.4923085918.

The spelling of 469989661 in words is "four hundred sixty-nine million, nine hundred eighty-nine thousand, six hundred sixty-one".