55072747 has 2 divisors, whose sum is σ = 55072748. Its totient is φ = 55072746.

The previous prime is 55072681. The next prime is 55072753. The reversal of 55072747 is 74727055.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55072747 is a prime.

It is a super-3 number, since 3×55072747³ (a number of 24 digits) contains 333 as substring.

It is a nialpdrome in base 13.

It is not a weakly prime, because it can be changed into another prime (55072757) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27536373 + 27536374.

It is an arithmetic number, because the mean of its divisors is an integer number (27536374).

Almost surely, 2^55072747 is an apocalyptic number.

55072747 is a deficient number, since it is larger than the sum of its proper divisors (1).

55072747 is an equidigital number, since it uses as much as digits as its factorization.

55072747 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 68600, while the sum is 37.

The square root of 55072747 is about 7421.1014681111. The cubic root of 55072747 is about 380.4628409236.

The spelling of 55072747 in words is "fifty-five million, seventy-two thousand, seven hundred forty-seven".