1330935257 has 4 divisors (see below), whose sum is σ = 1349680896. Its totient is φ = 1312189620.

The previous prime is 1330935247. The next prime is 1330935259. The reversal of 1330935257 is 7525390331.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 7525390331 = 8861 ⋅849271.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1330935257 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1330935257.

It is not an unprimeable number, because it can be changed into a prime (1330935259) 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, 9372713 + ... + 9372854.

It is an arithmetic number, because the mean of its divisors is an integer number (337420224).

Almost surely, 2^1330935257 is an apocalyptic number.

It is an amenable number.

1330935257 is a deficient number, since it is larger than the sum of its proper divisors (18745639).

1330935257 is an equidigital number, since it uses as much as digits as its factorization.

1330935257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18745638.

The product of its (nonzero) digits is 85050, while the sum is 38.

The square root of 1330935257 is about 36481.9853763470. The cubic root of 1330935257 is about 1099.9821641736.

The spelling of 1330935257 in words is "one billion, three hundred thirty million, nine hundred thirty-five thousand, two hundred fifty-seven".