55928947 has 2 divisors, whose sum is σ = 55928948. Its totient is φ = 55928946.

The previous prime is 55928933. The next prime is 55928959. The reversal of 55928947 is 74982955.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 55928947 - 2¹⁹ = 55404659 is a prime.

It is a super-2 number, since 2×55928947² = 6256094225057618, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 55928947.

It is not a weakly prime, because it can be changed into another prime (55928347) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27964473 + 27964474.

It is an arithmetic number, because the mean of its divisors is an integer number (27964474).

Almost surely, 2^55928947 is an apocalyptic number.

55928947 is a deficient number, since it is larger than the sum of its proper divisors (1).

55928947 is an equidigital number, since it uses as much as digits as its factorization.

55928947 is an evil number, because the sum of its binary digits is even.

The product of its digits is 907200, while the sum is 49.

The square root of 55928947 is about 7478.5658384479. The cubic root of 55928947 is about 382.4243591438.

The spelling of 55928947 in words is "fifty-five million, nine hundred twenty-eight thousand, nine hundred forty-seven".