1361947743 has 16 divisors (see below), whose sum is σ = 2172908640. Its totient is φ = 838121472.

The previous prime is 1361947711. The next prime is 1361947751. The reversal of 1361947743 is 3477491631.

1361947743 is a `hidden beast` number, since 136 + 1 + 9 + 477 + 43 = 666.

It is not a de Polignac number, because 1361947743 - 2⁵ = 1361947711 is a prime.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1361947703) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1939746 + ... + 1940447.

It is an arithmetic number, because the mean of its divisors is an integer number (135806790).

Almost surely, 2^1361947743 is an apocalyptic number.

1361947743 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1361947743 is a deficient number, since it is larger than the sum of its proper divisors (810960897).

1361947743 is a wasteful number, since it uses less digits than its factorization.

1361947743 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3880215 (or 3880209 counting only the distinct ones).

The product of its digits is 381024, while the sum is 45.

The square root of 1361947743 is about 36904.5761796556. The cubic root of 1361947743 is about 1108.4603123191.

The spelling of 1361947743 in words is "one billion, three hundred sixty-one million, nine hundred forty-seven thousand, seven hundred forty-three".