10557691 has 4 divisors (see below), whose sum is σ = 10843072. Its totient is φ = 10272312.

The previous prime is 10557649. The next prime is 10557707. The reversal of 10557691 is 19675501.

10557691 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 19675501 = 179 ⋅109919.

It is a cyclic number.

It is not a de Polignac number, because 10557691 - 2¹³ = 10549499 is a prime.

It is a super-2 number, since 2×10557691² = 222929678502962, which contains 22 as substring.

It is a nialpdrome in base 15.

It is not an unprimeable number, because it can be changed into a prime (10557611) 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, 142635 + ... + 142708.

It is an arithmetic number, because the mean of its divisors is an integer number (2710768).

Almost surely, 2^10557691 is an apocalyptic number.

10557691 is a deficient number, since it is larger than the sum of its proper divisors (285381).

10557691 is an equidigital number, since it uses as much as digits as its factorization.

10557691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 285380.

The product of its (nonzero) digits is 9450, while the sum is 34.

The square root of 10557691 is about 3249.2600696159. The cubic root of 10557691 is about 219.3762705045.

The spelling of 10557691 in words is "ten million, five hundred fifty-seven thousand, six hundred ninety-one".