1023689661 has 8 divisors (see below), whose sum is σ = 1365101664. Its totient is φ = 682368720.

The previous prime is 1023689627. The next prime is 1023689671. The reversal of 1023689661 is 1669863201.

1023689661 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1023689661 - 2¹⁰ = 1023688637 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1023689671) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10350 + ... + 46416.

It is an arithmetic number, because the mean of its divisors is an integer number (170637708).

Almost surely, 2^1023689661 is an apocalyptic number.

It is an amenable number.

1023689661 is a deficient number, since it is larger than the sum of its proper divisors (341412003).

1023689661 is an equidigital number, since it uses as much as digits as its factorization.

1023689661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45531.

The product of its (nonzero) digits is 93312, while the sum is 42.

The square root of 1023689661 is about 31995.1505856747. The cubic root of 1023689661 is about 1007.8350060239.

The spelling of 1023689661 in words is "one billion, twenty-three million, six hundred eighty-nine thousand, six hundred sixty-one".