3257557489 has 2 divisors, whose sum is σ = 3257557490. Its totient is φ = 3257557488.

The previous prime is 3257557439. The next prime is 3257557547. The reversal of 3257557489 is 9847557523.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1722250000 + 1535307489 = 41500^2 + 39183^2 .

It is an emirp because it is prime and its reverse (9847557523) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3257557489 is a prime.

It is a super-2 number, since 2×3257557489² = 21223361588279970242, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (3257557409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1628778744 + 1628778745.

It is an arithmetic number, because the mean of its divisors is an integer number (1628778745).

Almost surely, 2^3257557489 is an apocalyptic number.

It is an amenable number.

3257557489 is a deficient number, since it is larger than the sum of its proper divisors (1).

3257557489 is an equidigital number, since it uses as much as digits as its factorization.

3257557489 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10584000, while the sum is 55.

The square root of 3257557489 is about 57075.0163293888. The cubic root of 3257557489 is about 1482.3953008442.

The spelling of 3257557489 in words is "three billion, two hundred fifty-seven million, five hundred fifty-seven thousand, four hundred eighty-nine".