1220444413 has 2 divisors, whose sum is σ = 1220444414. Its totient is φ = 1220444412.

The previous prime is 1220444383. The next prime is 1220444429. The reversal of 1220444413 is 3144440221.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1153417444 + 67026969 = 33962^2 + 8187^2 .

It is a cyclic number.

It is not a de Polignac number, because 1220444413 - 2¹³ = 1220436221 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1220444443) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 610222206 + 610222207.

It is an arithmetic number, because the mean of its divisors is an integer number (610222207).

Almost surely, 2^1220444413 is an apocalyptic number.

It is an amenable number.

1220444413 is a deficient number, since it is larger than the sum of its proper divisors (1).

1220444413 is an equidigital number, since it uses as much as digits as its factorization.

1220444413 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3072, while the sum is 25.

The square root of 1220444413 is about 34934.8595674865. The cubic root of 1220444413 is about 1068.6594598904.

Adding to 1220444413 its reverse (3144440221), we get a palindrome (4364884634).

The spelling of 1220444413 in words is "one billion, two hundred twenty million, four hundred forty-four thousand, four hundred thirteen".