1368964493 has 4 divisors (see below), whose sum is σ = 1474269468. Its totient is φ = 1263659520.

The previous prime is 1368964481. The next prime is 1368964511. The reversal of 1368964493 is 3944698631.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3944698631 = 5701 ⋅691931.

It can be written as a sum of positive squares in 2 ways, for example, as 747858409 + 621106084 = 27347^2 + 24922^2 .

It is a cyclic number.

It is not a de Polignac number, because 1368964493 - 2¹⁰ = 1368963469 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1368964453) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 52652468 + ... + 52652493.

It is an arithmetic number, because the mean of its divisors is an integer number (368567367).

Almost surely, 2^1368964493 is an apocalyptic number.

1368964493 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

1368964493 is a deficient number, since it is larger than the sum of its proper divisors (105304975).

1368964493 is a wasteful number, since it uses less digits than its factorization.

1368964493 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105304974.

The product of its digits is 3359232, while the sum is 53.

The square root of 1368964493 is about 36999.5201725644. The cubic root of 1368964493 is about 1110.3606470882.

The spelling of 1368964493 in words is "one billion, three hundred sixty-eight million, nine hundred sixty-four thousand, four hundred ninety-three".