1232656989 has 8 divisors (see below), whose sum is σ = 1650783840. Its totient is φ = 818150736.

The previous prime is 1232656981. The next prime is 1232656991. The reversal of 1232656989 is 9896562321.

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

It is not a de Polignac number, because 1232656989 - 2³ = 1232656981 is a prime.

It is a super-2 number, since 2×1232656989² = 3038886505061092242, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1232656981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 904354 + ... + 905715.

It is an arithmetic number, because the mean of its divisors is an integer number (206347980).

Almost surely, 2^1232656989 is an apocalyptic number.

It is an amenable number.

1232656989 is a deficient number, since it is larger than the sum of its proper divisors (418126851).

1232656989 is a wasteful number, since it uses less digits than its factorization.

1232656989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1810299.

The product of its digits is 1399680, while the sum is 51.

The square root of 1232656989 is about 35109.2151578471. The cubic root of 1232656989 is about 1072.2122074352.

The spelling of 1232656989 in words is "one billion, two hundred thirty-two million, six hundred fifty-six thousand, nine hundred eighty-nine".