1386313949 has 2 divisors, whose sum is σ = 1386313950. Its totient is φ = 1386313948.

The previous prime is 1386313939. The next prime is 1386313961. The reversal of 1386313949 is 9493136831.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 885360025 + 500953924 = 29755^2 + 22382^2 .

It is a cyclic number.

It is not a de Polignac number, because 1386313949 - 2⁸ = 1386313693 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1386313939) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 693156974 + 693156975.

It is an arithmetic number, because the mean of its divisors is an integer number (693156975).

Almost surely, 2^1386313949 is an apocalyptic number.

It is an amenable number.

1386313949 is a deficient number, since it is larger than the sum of its proper divisors (1).

1386313949 is an equidigital number, since it uses as much as digits as its factorization.

1386313949 is an evil number, because the sum of its binary digits is even.

The product of its digits is 419904, while the sum is 47.

The square root of 1386313949 is about 37233.2371544565. The cubic root of 1386313949 is about 1115.0316570875.

The spelling of 1386313949 in words is "one billion, three hundred eighty-six million, three hundred thirteen thousand, nine hundred forty-nine".