3249689257 has 4 divisors (see below), whose sum is σ = 3255630736. Its totient is φ = 3243747780.

The previous prime is 3249689237. The next prime is 3249689269. The reversal of 3249689257 is 7529869423.

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: 7529869423 = 19 ⋅396308917.

It is a cyclic number.

It is not a de Polignac number, because 3249689257 - 2¹⁹ = 3249164969 is a prime.

It is a super-2 number, since 2×3249689257² = 21120960534122424098, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3249689198 and 3249689207.

It is not an unprimeable number, because it can be changed into a prime (3249689227) 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, 2969919 + ... + 2971012.

It is an arithmetic number, because the mean of its divisors is an integer number (813907684).

Almost surely, 2^3249689257 is an apocalyptic number.

It is an amenable number.

3249689257 is a deficient number, since it is larger than the sum of its proper divisors (5941479).

3249689257 is an equidigital number, since it uses as much as digits as its factorization.

3249689257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5941478.

The product of its digits is 6531840, while the sum is 55.

The square root of 3249689257 is about 57006.0457934069. The cubic root of 3249689257 is about 1481.2008237290.

The spelling of 3249689257 in words is "three billion, two hundred forty-nine million, six hundred eighty-nine thousand, two hundred fifty-seven".