55649329 has 4 divisors (see below), whose sum is σ = 56479984. Its totient is φ = 54818676.

The previous prime is 55649327. The next prime is 55649339. The reversal of 55649329 is 92394655.

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: 92394655 = 5 ⋅18478931.

It is a cyclic number.

It is not a de Polignac number, because 55649329 - 2¹ = 55649327 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55649323) 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, 415227 + ... + 415360.

It is an arithmetic number, because the mean of its divisors is an integer number (14119996).

Almost surely, 2^55649329 is an apocalyptic number.

It is an amenable number.

55649329 is a deficient number, since it is larger than the sum of its proper divisors (830655).

55649329 is an equidigital number, since it uses as much as digits as its factorization.

55649329 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 830654.

The product of its digits is 291600, while the sum is 43.

The square root of 55649329 is about 7459.8477866509. The cubic root of 55649329 is about 381.7859811005.

The spelling of 55649329 in words is "fifty-five million, six hundred forty-nine thousand, three hundred twenty-nine".