11057639 has 4 divisors (see below), whose sum is σ = 11639640. Its totient is φ = 10475640.

The previous prime is 11057623. The next prime is 11057647. The reversal of 11057639 is 93675011.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 11057639 - 2⁴ = 11057623 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11057609) 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, 290972 + ... + 291009.

It is an arithmetic number, because the mean of its divisors is an integer number (2909910).

Almost surely, 2^11057639 is an apocalyptic number.

11057639 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

11057639 is a deficient number, since it is larger than the sum of its proper divisors (582001).

11057639 is an equidigital number, since it uses as much as digits as its factorization.

11057639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 582000.

The product of its (nonzero) digits is 5670, while the sum is 32.

The square root of 11057639 is about 3325.3028433513. The cubic root of 11057639 is about 222.7857809968.

The spelling of 11057639 in words is "eleven million, fifty-seven thousand, six hundred thirty-nine".