54889729 has 2 divisors, whose sum is σ = 54889730. Its totient is φ = 54889728.

The previous prime is 54889717. The next prime is 54889739. The reversal of 54889729 is 92798845.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 52533504 + 2356225 = 7248^2 + 1535^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-54889729 is a prime.

It is not a weakly prime, because it can be changed into another prime (54889739) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27444864 + 27444865.

It is an arithmetic number, because the mean of its divisors is an integer number (27444865).

Almost surely, 2^54889729 is an apocalyptic number.

It is an amenable number.

54889729 is a deficient number, since it is larger than the sum of its proper divisors (1).

54889729 is an equidigital number, since it uses as much as digits as its factorization.

54889729 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1451520, while the sum is 52.

The square root of 54889729 is about 7408.7602876595. The cubic root of 54889729 is about 380.0409212626.

The spelling of 54889729 in words is "fifty-four million, eight hundred eighty-nine thousand, seven hundred twenty-nine".