55709697 has 32 divisors (see below), whose sum is σ = 82059264. Its totient is φ = 33465600.

The previous prime is 55709677. The next prime is 55709699. The reversal of 55709697 is 79690755.

It is not a de Polignac number, because 55709697 - 2⁷ = 55709569 is a prime.

It is not an unprimeable number, because it can be changed into a prime (55709699) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 263922 + ... + 264132.

It is an arithmetic number, because the mean of its divisors is an integer number (2564352).

Almost surely, 2^55709697 is an apocalyptic number.

It is an amenable number.

55709697 is a deficient number, since it is larger than the sum of its proper divisors (26349567).

55709697 is a wasteful number, since it uses less digits than its factorization.

55709697 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 429.

The product of its (nonzero) digits is 595350, while the sum is 48.

The square root of 55709697 is about 7463.8928850835. The cubic root of 55709697 is about 381.9239841250.

The spelling of 55709697 in words is "fifty-five million, seven hundred nine thousand, six hundred ninety-seven".