1368123949 has 2 divisors, whose sum is σ = 1368123950. Its totient is φ = 1368123948.

The previous prime is 1368123917. The next prime is 1368123959. The reversal of 1368123949 is 9493218631.

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., 1367668324 + 455625 = 36982^2 + 675^2 .

It is a cyclic number.

It is not a de Polignac number, because 1368123949 - 2⁵ = 1368123917 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1368123899 and 1368123908.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1368123959) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 684061974 + 684061975.

It is an arithmetic number, because the mean of its divisors is an integer number (684061975).

Almost surely, 2^1368123949 is an apocalyptic number.

It is an amenable number.

1368123949 is a deficient number, since it is larger than the sum of its proper divisors (1).

1368123949 is an equidigital number, since it uses as much as digits as its factorization.

1368123949 is an evil number, because the sum of its binary digits is even.

The product of its digits is 279936, while the sum is 46.

The square root of 1368123949 is about 36988.1595784381. The cubic root of 1368123949 is about 1110.1333468024.

The spelling of 1368123949 in words is "one billion, three hundred sixty-eight million, one hundred twenty-three thousand, nine hundred forty-nine".