1220873453 has 2 divisors, whose sum is σ = 1220873454. Its totient is φ = 1220873452.

The previous prime is 1220873429. The next prime is 1220873461. The reversal of 1220873453 is 3543780221.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1023808009 + 197065444 = 31997^2 + 14038^2 .

It is a cyclic number.

It is not a de Polignac number, because 1220873453 - 2¹⁸ = 1220611309 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1220873483) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 610436726 + 610436727.

It is an arithmetic number, because the mean of its divisors is an integer number (610436727).

Almost surely, 2^1220873453 is an apocalyptic number.

It is an amenable number.

1220873453 is a deficient number, since it is larger than the sum of its proper divisors (1).

1220873453 is an equidigital number, since it uses as much as digits as its factorization.

1220873453 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 40320, while the sum is 35.

The square root of 1220873453 is about 34940.9995993246. Note that the first 3 decimals coincide. The cubic root of 1220873453 is about 1068.7846721855.

The spelling of 1220873453 in words is "one billion, two hundred twenty million, eight hundred seventy-three thousand, four hundred fifty-three".