55679999 has 4 divisors (see below), whose sum is σ = 57476160. Its totient is φ = 53883840.

The previous prime is 55679989. The next prime is 55680017. The reversal of 55679999 is 99997655.

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 55679999 - 2⁴ = 55679983 is a prime.

It is a Duffinian number.

55679999 is a modest number, since divided by 9999 gives 5567 as remainder.

It is a plaindrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55679909) 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, 898034 + ... + 898095.

It is an arithmetic number, because the mean of its divisors is an integer number (14369040).

Almost surely, 2^55679999 is an apocalyptic number.

55679999 is a deficient number, since it is larger than the sum of its proper divisors (1796161).

55679999 is a wasteful number, since it uses less digits than its factorization.

55679999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1796160.

The product of its digits is 6889050, while the sum is 59.

The square root of 55679999 is about 7461.9031754640. The cubic root of 55679999 is about 381.8561060884.

The spelling of 55679999 in words is "fifty-five million, six hundred seventy-nine thousand, nine hundred ninety-nine".