1220654429 has 2 divisors, whose sum is σ = 1220654430. Its totient is φ = 1220654428.

The previous prime is 1220654401. The next prime is 1220654443. The reversal of 1220654429 is 9244560221.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 739948804 + 480705625 = 27202^2 + 21925^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1220654429 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1220654489) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 610327214 + 610327215.

It is an arithmetic number, because the mean of its divisors is an integer number (610327215).

Almost surely, 2^1220654429 is an apocalyptic number.

It is an amenable number.

1220654429 is a deficient number, since it is larger than the sum of its proper divisors (1).

1220654429 is an equidigital number, since it uses as much as digits as its factorization.

1220654429 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 34560, while the sum is 35.

The square root of 1220654429 is about 34937.8652610602. The cubic root of 1220654429 is about 1068.7207552432.

The spelling of 1220654429 in words is "one billion, two hundred twenty million, six hundred fifty-four thousand, four hundred twenty-nine".