55700309 has 6 divisors (see below), whose sum is σ = 64794294. Its totient is φ = 47743080.

The previous prime is 55700287. The next prime is 55700317. The reversal of 55700309 is 90300755.

It can be written as a sum of positive squares in only one way, i.e., 54538225 + 1162084 = 7385^2 + 1078^2 .

It is a de Polignac number, because none of the positive numbers 2^k-55700309 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55700369) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 568322 + ... + 568419.

It is an arithmetic number, because the mean of its divisors is an integer number (10799049).

Almost surely, 2^55700309 is an apocalyptic number.

It is an amenable number.

55700309 is a deficient number, since it is larger than the sum of its proper divisors (9093985).

55700309 is a wasteful number, since it uses less digits than its factorization.

55700309 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1136755 (or 1136748 counting only the distinct ones).

The product of its (nonzero) digits is 4725, while the sum is 29.

The square root of 55700309 is about 7463.2639642451. The cubic root of 55700309 is about 381.9025294293.

The spelling of 55700309 in words is "fifty-five million, seven hundred thousand, three hundred nine".