55770839 has 4 divisors (see below), whose sum is σ = 55791840. Its totient is φ = 55749840.

The previous prime is 55770821. The next prime is 55770853. The reversal of 55770839 is 93807755.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 55770839 - 2¹⁶ = 55705303 is a prime.

It is a super-2 number, since 2×55770839² = 6220772965527842, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 55770839.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55770809) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5822 + ... + 12059.

It is an arithmetic number, because the mean of its divisors is an integer number (13947960).

Almost surely, 2^55770839 is an apocalyptic number.

55770839 is a deficient number, since it is larger than the sum of its proper divisors (21001).

55770839 is a wasteful number, since it uses less digits than its factorization.

55770839 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21000.

The product of its (nonzero) digits is 264600, while the sum is 44.

The square root of 55770839 is about 7467.9876138087. The cubic root of 55770839 is about 382.0636549533.

The spelling of 55770839 in words is "fifty-five million, seven hundred seventy thousand, eight hundred thirty-nine".