1228329497 has 2 divisors, whose sum is σ = 1228329498. Its totient is φ = 1228329496.

The previous prime is 1228329469. The next prime is 1228329503. The reversal of 1228329497 is 7949238221.

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., 1227521296 + 808201 = 35036^2 + 899^2 .

It is a cyclic number.

It is not a de Polignac number, because 1228329497 - 2⁶ = 1228329433 is a prime.

It is not a weakly prime, because it can be changed into another prime (1228329457) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 614164748 + 614164749.

It is an arithmetic number, because the mean of its divisors is an integer number (614164749).

Almost surely, 2^1228329497 is an apocalyptic number.

It is an amenable number.

1228329497 is a deficient number, since it is larger than the sum of its proper divisors (1).

1228329497 is an equidigital number, since it uses as much as digits as its factorization.

1228329497 is an evil number, because the sum of its binary digits is even.

The product of its digits is 435456, while the sum is 47.

The square root of 1228329497 is about 35047.5319673155. The cubic root of 1228329497 is about 1070.9559968588.

The spelling of 1228329497 in words is "one billion, two hundred twenty-eight million, three hundred twenty-nine thousand, four hundred ninety-seven".