1220198927 has 2 divisors, whose sum is σ = 1220198928. Its totient is φ = 1220198926.

The previous prime is 1220198923. The next prime is 1220198933. The reversal of 1220198927 is 7298910221.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1220198927 - 2² = 1220198923 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1220198923) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 610099463 + 610099464.

It is an arithmetic number, because the mean of its divisors is an integer number (610099464).

Almost surely, 2^1220198927 is an apocalyptic number.

1220198927 is a deficient number, since it is larger than the sum of its proper divisors (1).

1220198927 is an equidigital number, since it uses as much as digits as its factorization.

1220198927 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36288, while the sum is 41.

The square root of 1220198927 is about 34931.3459087966. The cubic root of 1220198927 is about 1068.5878033351.

The spelling of 1220198927 in words is "one billion, two hundred twenty million, one hundred ninety-eight thousand, nine hundred twenty-seven".