1213229957 has 2 divisors, whose sum is σ = 1213229958. Its totient is φ = 1213229956.

The previous prime is 1213229891. The next prime is 1213229977. The reversal of 1213229957 is 7599223121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1207632001 + 5597956 = 34751^2 + 2366^2 .

It is a cyclic number.

It is not a de Polignac number, because 1213229957 - 2²⁰ = 1212181381 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1213229977) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 606614978 + 606614979.

It is an arithmetic number, because the mean of its divisors is an integer number (606614979).

Almost surely, 2^1213229957 is an apocalyptic number.

It is an amenable number.

1213229957 is a deficient number, since it is larger than the sum of its proper divisors (1).

1213229957 is an equidigital number, since it uses as much as digits as its factorization.

1213229957 is an evil number, because the sum of its binary digits is even.

The product of its digits is 68040, while the sum is 41.

The square root of 1213229957 is about 34831.4506875611. The cubic root of 1213229957 is about 1066.5495622201.

The spelling of 1213229957 in words is "one billion, two hundred thirteen million, two hundred twenty-nine thousand, nine hundred fifty-seven".