1302012189949 has 2 divisors, whose sum is σ = 1302012189950. Its totient is φ = 1302012189948.

The previous prime is 1302012189931. The next prime is 1302012189971. The reversal of 1302012189949 is 9499812102031.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1301839924324 + 172265625 = 1140982^2 + 13125^2 .

It is a cyclic number.

It is not a de Polignac number, because 1302012189949 - 2²³ = 1302003801341 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1302012189349) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 651006094974 + 651006094975.

It is an arithmetic number, because the mean of its divisors is an integer number (651006094975).

Almost surely, 2^{1302012189949} is an apocalyptic number.

It is an amenable number.

1302012189949 is a deficient number, since it is larger than the sum of its proper divisors (1).

1302012189949 is an equidigital number, since it uses as much as digits as its factorization.

1302012189949 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 279936, while the sum is 49.

The spelling of 1302012189949 in words is "one trillion, three hundred two billion, twelve million, one hundred eighty-nine thousand, nine hundred forty-nine".