1368857465 has 4 divisors (see below), whose sum is σ = 1642628964. Its totient is φ = 1095085968.

The previous prime is 1368857461. The next prime is 1368857467. The reversal of 1368857465 is 5647588631.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5647588631 = 509 ⋅11095459.

It can be written as a sum of positive squares in 2 ways, for example, as 376670464 + 992187001 = 19408^2 + 31499^2 .

It is a cyclic number.

It is not a de Polignac number, because 1368857465 - 2² = 1368857461 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1368857461) 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 3 ways as a sum of consecutive naturals, for example, 136885742 + ... + 136885751.

It is an arithmetic number, because the mean of its divisors is an integer number (410657241).

Almost surely, 2^1368857465 is an apocalyptic number.

It is an amenable number.

1368857465 is a deficient number, since it is larger than the sum of its proper divisors (273771499).

1368857465 is an equidigital number, since it uses as much as digits as its factorization.

1368857465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 273771498.

The product of its digits is 4838400, while the sum is 53.

The square root of 1368857465 is about 36998.0738012129. The cubic root of 1368857465 is about 1110.3317096987.

The spelling of 1368857465 in words is "one billion, three hundred sixty-eight million, eight hundred fifty-seven thousand, four hundred sixty-five".