1220894953 has 2 divisors, whose sum is σ = 1220894954. Its totient is φ = 1220894952.

The previous prime is 1220894911. The next prime is 1220894977. The reversal of 1220894953 is 3594980221.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1218498649 + 2396304 = 34907^2 + 1548^2 .

It is a cyclic number.

It is not a de Polignac number, because 1220894953 - 2¹³ = 1220886761 is a prime.

It is not a weakly prime, because it can be changed into another prime (1220894903) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 610447476 + 610447477.

It is an arithmetic number, because the mean of its divisors is an integer number (610447477).

Almost surely, 2^1220894953 is an apocalyptic number.

It is an amenable number.

1220894953 is a deficient number, since it is larger than the sum of its proper divisors (1).

1220894953 is an equidigital number, since it uses as much as digits as its factorization.

1220894953 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 155520, while the sum is 43.

The square root of 1220894953 is about 34941.3072594601. The cubic root of 1220894953 is about 1068.7909460368.

The spelling of 1220894953 in words is "one billion, two hundred twenty million, eight hundred ninety-four thousand, nine hundred fifty-three".