11361639 has 16 divisors (see below), whose sum is σ = 16289280. Its totient is φ = 7021440.

The previous prime is 11361613. The next prime is 11361641. The reversal of 11361639 is 93616311.

It is not a de Polignac number, because 11361639 - 2⁵ = 11361607 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11361139) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 559 + ... + 4799.

It is an arithmetic number, because the mean of its divisors is an integer number (1018080).

Almost surely, 2^11361639 is an apocalyptic number.

11361639 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

11361639 is a deficient number, since it is larger than the sum of its proper divisors (4927641).

11361639 is a wasteful number, since it uses less digits than its factorization.

11361639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4310.

The product of its digits is 2916, while the sum is 30.

The square root of 11361639 is about 3370.7030423934. The cubic root of 11361639 is about 224.8089835592.

It can be divided in two parts, 1136 and 1639, that added together give a triangular number (2775 = T₇₄).

The spelling of 11361639 in words is "eleven million, three hundred sixty-one thousand, six hundred thirty-nine".