1223029957 has 2 divisors, whose sum is σ = 1223029958. Its totient is φ = 1223029956.

The previous prime is 1223029909. The next prime is 1223029967. The reversal of 1223029957 is 7599203221.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 661055521 + 561974436 = 25711^2 + 23706^2 .

It is an emirp because it is prime and its reverse (7599203221) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1223029957 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1223029967) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 611514978 + 611514979.

It is an arithmetic number, because the mean of its divisors is an integer number (611514979).

Almost surely, 2^1223029957 is an apocalyptic number.

It is an amenable number.

1223029957 is a deficient number, since it is larger than the sum of its proper divisors (1).

1223029957 is an equidigital number, since it uses as much as digits as its factorization.

1223029957 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 68040, while the sum is 40.

The square root of 1223029957 is about 34971.8452043926. The cubic root of 1223029957 is about 1069.4135887713.

The spelling of 1223029957 in words is "one billion, two hundred twenty-three million, twenty-nine thousand, nine hundred fifty-seven".