55279999 has 2 divisors, whose sum is σ = 55280000. Its totient is φ = 55279998.

The previous prime is 55279993. The next prime is 55280023. The reversal of 55279999 is 99997255.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 55279999 - 2⁵ = 55279967 is a prime.

55279999 is a modest number, since divided by 9999 gives 5527 as remainder.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55279993) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27639999 + 27640000.

It is an arithmetic number, because the mean of its divisors is an integer number (27640000).

Almost surely, 2^55279999 is an apocalyptic number.

55279999 is a deficient number, since it is larger than the sum of its proper divisors (1).

55279999 is an equidigital number, since it uses as much as digits as its factorization.

55279999 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2296350, while the sum is 55.

The square root of 55279999 is about 7435.0520509274. The cubic root of 55279999 is about 380.9395012359.

The spelling of 55279999 in words is "fifty-five million, two hundred seventy-nine thousand, nine hundred ninety-nine".