1229877997 has 2 divisors, whose sum is σ = 1229877998. Its totient is φ = 1229877996.

The previous prime is 1229877991. The next prime is 1229878003. The reversal of 1229877997 is 7997789221.

It is a balanced prime because it is at equal distance from previous prime (1229877991) and next prime (1229878003).

It can be written as a sum of positive squares in only one way, i.e., 1025216361 + 204661636 = 32019^2 + 14306^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1229877997 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1229877991) 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, 614938998 + 614938999.

It is an arithmetic number, because the mean of its divisors is an integer number (614938999).

Almost surely, 2^1229877997 is an apocalyptic number.

It is an amenable number.

1229877997 is a deficient number, since it is larger than the sum of its proper divisors (1).

1229877997 is an equidigital number, since it uses as much as digits as its factorization.

1229877997 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8001504, while the sum is 61.

The square root of 1229877997 is about 35069.6164364539. The cubic root of 1229877997 is about 1071.4058433028.

The spelling of 1229877997 in words is "one billion, two hundred twenty-nine million, eight hundred seventy-seven thousand, nine hundred ninety-seven".