1213954433 has 2 divisors, whose sum is σ = 1213954434. Its totient is φ = 1213954432.

The previous prime is 1213954381. The next prime is 1213954447. The reversal of 1213954433 is 3344593121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1034715889 + 179238544 = 32167^2 + 13388^2 .

It is a cyclic number.

It is not a de Polignac number, because 1213954433 - 2⁸ = 1213954177 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1213954393 and 1213954402.

It is not a weakly prime, because it can be changed into another prime (1213954463) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 606977216 + 606977217.

It is an arithmetic number, because the mean of its divisors is an integer number (606977217).

Almost surely, 2^1213954433 is an apocalyptic number.

It is an amenable number.

1213954433 is a deficient number, since it is larger than the sum of its proper divisors (1).

1213954433 is an equidigital number, since it uses as much as digits as its factorization.

1213954433 is an evil number, because the sum of its binary digits is even.

The product of its digits is 38880, while the sum is 35.

The square root of 1213954433 is about 34841.8488745933. The cubic root of 1213954433 is about 1066.7618154164.

The spelling of 1213954433 in words is "one billion, two hundred thirteen million, nine hundred fifty-four thousand, four hundred thirty-three".