1220699829 has 8 divisors (see below), whose sum is σ = 1642532320. Its totient is φ = 806333616.

The previous prime is 1220699801. The next prime is 1220699833. The reversal of 1220699829 is 9289960221.

It is a happy number.

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

It is not a de Polignac number, because 1220699829 - 2⁸ = 1220699573 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220694829) 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, 1866187 + ... + 1866840.

It is an arithmetic number, because the mean of its divisors is an integer number (205316540).

Almost surely, 2^1220699829 is an apocalyptic number.

It is an amenable number.

1220699829 is a deficient number, since it is larger than the sum of its proper divisors (421832491).

1220699829 is a wasteful number, since it uses less digits than its factorization.

1220699829 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3733139.

The product of its (nonzero) digits is 279936, while the sum is 48.

The square root of 1220699829 is about 34938.5149798900. The cubic root of 1220699829 is about 1068.7340047810.

The spelling of 1220699829 in words is "one billion, two hundred twenty million, six hundred ninety-nine thousand, eight hundred twenty-nine".