1220039929 has 4 divisors (see below), whose sum is σ = 1221471076. Its totient is φ = 1218608784.

The previous prime is 1220039927. The next prime is 1220039957. The reversal of 1220039929 is 9299300221.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 187060329 + 1032979600 = 13677^2 + 32140^2 .

It is a cyclic number.

It is not a de Polignac number, because 1220039929 - 2¹ = 1220039927 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1220039923) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 714294 + ... + 715999.

It is an arithmetic number, because the mean of its divisors is an integer number (305367769).

Almost surely, 2^1220039929 is an apocalyptic number.

It is an amenable number.

1220039929 is a deficient number, since it is larger than the sum of its proper divisors (1431147).

1220039929 is an equidigital number, since it uses as much as digits as its factorization.

1220039929 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1431146.

The product of its (nonzero) digits is 17496, while the sum is 37.

The square root of 1220039929 is about 34929.0699704415. The cubic root of 1220039929 is about 1068.5413872139.

The spelling of 1220039929 in words is "one billion, two hundred twenty million, thirty-nine thousand, nine hundred twenty-nine".