10557749 has 4 divisors (see below), whose sum is σ = 11113440. Its totient is φ = 10002060.

The previous prime is 10557737. The next prime is 10557773. The reversal of 10557749 is 94775501.

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: 94775501 = 53 ⋅1788217.

It is a cyclic number.

It is not a de Polignac number, because 10557749 - 2²⁰ = 9509173 is a prime.

It is a super-2 number, since 2×10557749² = 222932127894002, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10557709) 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, 277817 + ... + 277854.

It is an arithmetic number, because the mean of its divisors is an integer number (2778360).

Almost surely, 2^10557749 is an apocalyptic number.

10557749 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

10557749 is a deficient number, since it is larger than the sum of its proper divisors (555691).

10557749 is an equidigital number, since it uses as much as digits as its factorization.

10557749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 555690.

The product of its (nonzero) digits is 44100, while the sum is 38.

The square root of 10557749 is about 3249.2689947125. The cubic root of 10557749 is about 219.3766722275.

The spelling of 10557749 in words is "ten million, five hundred fifty-seven thousand, seven hundred forty-nine".