1220938153 has 4 divisors (see below), whose sum is σ = 1241632080. Its totient is φ = 1200244228.

The previous prime is 1220938151. The next prime is 1220938171. The reversal of 1220938153 is 3518390221.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 3518390221 = 36527 ⋅96323.

It is a cyclic number.

It is not a de Polignac number, because 1220938153 - 2¹ = 1220938151 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1220938151) 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, 10346875 + ... + 10346992.

It is an arithmetic number, because the mean of its divisors is an integer number (310408020).

Almost surely, 2^1220938153 is an apocalyptic number.

It is an amenable number.

1220938153 is a deficient number, since it is larger than the sum of its proper divisors (20693927).

1220938153 is an equidigital number, since it uses as much as digits as its factorization.

1220938153 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20693926.

The product of its (nonzero) digits is 12960, while the sum is 34.

The square root of 1220938153 is about 34941.9254334961. The cubic root of 1220938153 is about 1068.8035518781.

The spelling of 1220938153 in words is "one billion, two hundred twenty million, nine hundred thirty-eight thousand, one hundred fifty-three".