11201639 has 4 divisors (see below), whose sum is σ = 11504424. Its totient is φ = 10898856.

The previous prime is 11201611. The next prime is 11201653. The reversal of 11201639 is 93610211.

It is a happy number.

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 11201639 - 2⁸ = 11201383 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 (11201609) 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, 151337 + ... + 151410.

It is an arithmetic number, because the mean of its divisors is an integer number (2876106).

Almost surely, 2^11201639 is an apocalyptic number.

11201639 is a deficient number, since it is larger than the sum of its proper divisors (302785).

11201639 is an equidigital number, since it uses as much as digits as its factorization.

11201639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 302784.

The product of its (nonzero) digits is 324, while the sum is 23.

The square root of 11201639 is about 3346.8849696397. The cubic root of 11201639 is about 223.7487017600.

The spelling of 11201639 in words is "eleven million, two hundred one thousand, six hundred thirty-nine".