1229732409 has 8 divisors (see below), whose sum is σ = 1640801152. Its totient is φ = 819242640.

The previous prime is 1229732381. The next prime is 1229732411. The reversal of 1229732409 is 9042379221.

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

It is not a de Polignac number, because 1229732409 - 2⁹ = 1229731897 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1229732429) 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, 139762 + ... + 148299.

It is an arithmetic number, because the mean of its divisors is an integer number (205100144).

Almost surely, 2^1229732409 is an apocalyptic number.

It is an amenable number.

1229732409 is a deficient number, since it is larger than the sum of its proper divisors (411068743).

1229732409 is a wasteful number, since it uses less digits than its factorization.

1229732409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 289487.

The product of its (nonzero) digits is 54432, while the sum is 39.

The square root of 1229732409 is about 35067.5406751030. The cubic root of 1229732409 is about 1071.3635653995.

The spelling of 1229732409 in words is "one billion, two hundred twenty-nine million, seven hundred thirty-two thousand, four hundred nine".