55097779 has 8 divisors (see below), whose sum is σ = 60185088. Its totient is φ = 50023560.

The previous prime is 55097759. The next prime is 55097789. The reversal of 55097779 is 97779055.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 55097779 - 2¹¹ = 55095731 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55097729) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6934 + ... + 12580.

It is an arithmetic number, because the mean of its divisors is an integer number (7523136).

Almost surely, 2^55097779 is an apocalyptic number.

55097779 is a deficient number, since it is larger than the sum of its proper divisors (5087309).

55097779 is a wasteful number, since it uses less digits than its factorization.

55097779 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6545.

The product of its (nonzero) digits is 694575, while the sum is 49.

The square root of 55097779 is about 7422.7878186029. The cubic root of 55097779 is about 380.5204756206.

The spelling of 55097779 in words is "fifty-five million, ninety-seven thousand, seven hundred seventy-nine".