1333640465 has 4 divisors (see below), whose sum is σ = 1600368564. Its totient is φ = 1066912368.

The previous prime is 1333640459. The next prime is 1333640471. The reversal of 1333640465 is 5640463331.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5640463331 = 379 ⋅14882489.

It is an interprime number because it is at equal distance from previous prime (1333640459) and next prime (1333640471).

It can be written as a sum of positive squares in 2 ways, for example, as 389983504 + 943656961 = 19748^2 + 30719^2 .

It is a cyclic number.

It is not a de Polignac number, because 1333640465 - 2⁶ = 1333640401 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 133364042 + ... + 133364051.

It is an arithmetic number, because the mean of its divisors is an integer number (400092141).

Almost surely, 2^1333640465 is an apocalyptic number.

It is an amenable number.

1333640465 is a deficient number, since it is larger than the sum of its proper divisors (266728099).

1333640465 is an equidigital number, since it uses as much as digits as its factorization.

1333640465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 266728098.

The product of its (nonzero) digits is 77760, while the sum is 35.

The square root of 1333640465 is about 36519.0424984007. The cubic root of 1333640465 is about 1100.7269203450.

The spelling of 1333640465 in words is "one billion, three hundred thirty-three million, six hundred forty thousand, four hundred sixty-five".