55920847 has 4 divisors (see below), whose sum is σ = 56686960. Its totient is φ = 55154736.

The previous prime is 55920841. The next prime is 55920859. The reversal of 55920847 is 74802955.

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 55920847 - 2⁷ = 55920719 is a prime.

It is a super-2 number, since 2×55920847² = 6254282258394818, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55920841) 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, 382947 + ... + 383092.

It is an arithmetic number, because the mean of its divisors is an integer number (14171740).

Almost surely, 2^55920847 is an apocalyptic number.

55920847 is a deficient number, since it is larger than the sum of its proper divisors (766113).

55920847 is an equidigital number, since it uses as much as digits as its factorization.

55920847 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 766112.

The product of its (nonzero) digits is 100800, while the sum is 40.

The square root of 55920847 is about 7478.0242711561. The cubic root of 55920847 is about 382.4058965109.

The spelling of 55920847 in words is "fifty-five million, nine hundred twenty thousand, eight hundred forty-seven".