1226983553 has 4 divisors (see below), whose sum is σ = 1280330688. Its totient is φ = 1173636420.

The previous prime is 1226983487. The next prime is 1226983559. The reversal of 1226983553 is 3553896221.

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: 3553896221 = 23 ⋅154517227.

It is a cyclic number.

It is not a de Polignac number, because 1226983553 - 2¹⁴ = 1226967169 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1226983559) 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, 26673533 + ... + 26673578.

It is an arithmetic number, because the mean of its divisors is an integer number (320082672).

Almost surely, 2^1226983553 is an apocalyptic number.

It is an amenable number.

1226983553 is a deficient number, since it is larger than the sum of its proper divisors (53347135).

1226983553 is an equidigital number, since it uses as much as digits as its factorization.

1226983553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53347134.

The product of its digits is 388800, while the sum is 44.

The square root of 1226983553 is about 35028.3250099116. The cubic root of 1226983553 is about 1070.5646866521.

The spelling of 1226983553 in words is "one billion, two hundred twenty-six million, nine hundred eighty-three thousand, five hundred fifty-three".