1198945477 has 2 divisors, whose sum is σ = 1198945478. Its totient is φ = 1198945476.

The previous prime is 1198945469. The next prime is 1198945483. The reversal of 1198945477 is 7745498911.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 650964196 + 547981281 = 25514^2 + 23409^2 .

It is a cyclic number.

It is not a de Polignac number, because 1198945477 - 2³ = 1198945469 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1198945427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 599472738 + 599472739.

It is an arithmetic number, because the mean of its divisors is an integer number (599472739).

Almost surely, 2^1198945477 is an apocalyptic number.

It is an amenable number.

1198945477 is a deficient number, since it is larger than the sum of its proper divisors (1).

1198945477 is an equidigital number, since it uses as much as digits as its factorization.

1198945477 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2540160, while the sum is 55.

The square root of 1198945477 is about 34625.7920775829. The cubic root of 1198945477 is about 1062.3472007627.

The spelling of 1198945477 in words is "one billion, one hundred ninety-eight million, nine hundred forty-five thousand, four hundred seventy-seven".