1630606869 has 10 divisors (see below), whose sum is σ = 2435844950. Its totient is φ = 1087071192.

The previous prime is 1630606843. The next prime is 1630606877. The reversal of 1630606869 is 9686060361.

1630606869 is a `hidden beast` number, since 1 + 6 + 30 + 606 + 8 + 6 + 9 = 666.

It can be written as a sum of positive squares in only one way, i.e., 898200900 + 732405969 = 29970^2 + 27063^2 .

It is not a de Polignac number, because 1630606869 - 2¹¹ = 1630604821 is a prime.

It is a super-2 number, since 2×1630606869² = 5317757522459966322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1630606819) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 10065394 + ... + 10065555.

It is an arithmetic number, because the mean of its divisors is an integer number (243584495).

Almost surely, 2^1630606869 is an apocalyptic number.

It is an amenable number.

1630606869 is a deficient number, since it is larger than the sum of its proper divisors (805238081).

1630606869 is an equidigital number, since it uses as much as digits as its factorization.

1630606869 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20130961 (or 20130952 counting only the distinct ones).

The product of its (nonzero) digits is 279936, while the sum is 45.

The square root of 1630606869 is about 40380.7735067074. The cubic root of 1630606869 is about 1177.0179583962.

The spelling of 1630606869 in words is "one billion, six hundred thirty million, six hundred six thousand, eight hundred sixty-nine".