1220903959 has 16 divisors (see below), whose sum is σ = 1364484096. Its totient is φ = 1083045600.

The previous prime is 1220903941. The next prime is 1220903993. The reversal of 1220903959 is 9593090221.

It is a cyclic number.

It is not a de Polignac number, because 1220903959 - 2⁵ = 1220903927 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220903459) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 78054 + ... + 92380.

It is an arithmetic number, because the mean of its divisors is an integer number (85280256).

Almost surely, 2^1220903959 is an apocalyptic number.

1220903959 is a deficient number, since it is larger than the sum of its proper divisors (143580137).

1220903959 is a wasteful number, since it uses less digits than its factorization.

1220903959 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14526.

The product of its (nonzero) digits is 43740, while the sum is 40.

The square root of 1220903959 is about 34941.4361324774. The cubic root of 1220903959 is about 1068.7935740291.

The spelling of 1220903959 in words is "one billion, two hundred twenty million, nine hundred three thousand, nine hundred fifty-nine".