55039797 has 16 divisors (see below), whose sum is σ = 81672000. Its totient is φ = 36634032.

The previous prime is 55039741. The next prime is 55039799. The reversal of 55039797 is 79793055.

It is a happy number.

55039797 is a `hidden beast` number, since 550 + 3 + 9 + 7 + 97 = 666.

It is not a de Polignac number, because 55039797 - 2¹⁰ = 55038773 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55039799) 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, 21154 + ... + 23612.

It is an arithmetic number, because the mean of its divisors is an integer number (5104500).

Almost surely, 2^55039797 is an apocalyptic number.

It is an amenable number.

55039797 is a deficient number, since it is larger than the sum of its proper divisors (26632203).

55039797 is a wasteful number, since it uses less digits than its factorization.

55039797 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3297 (or 3291 counting only the distinct ones).

The product of its (nonzero) digits is 297675, while the sum is 45.

The square root of 55039797 is about 7418.8811151008. The cubic root of 55039797 is about 380.3869488701.

The spelling of 55039797 in words is "fifty-five million, thirty-nine thousand, seven hundred ninety-seven".